[err:数据源标签'PE.DataSource id="cone" datasource="资料_内容页" itemId="96454" xslt="true" wu="0"'返回数据错，原因：名称中不能包含“ ”字符(十六进制值 0xA0)。 行 457，位置 8。，源码：964543 <meta http-equiv="refresh" content="0;url=/Item/96454.aspx?wu=1" /> 2211【全国百强校】重庆市第十八中学2017-2018学年八年级上学期期中考试物理试题及答案868.00KB868.00Bdocczwlzx重庆市第十八中学czwlzx/UploadFiles/UserPic/UserAvatars/15219_150_150.jpg <script language="JavaScript" type="text/JavaScript" src="/Common/GetHits.aspx?id=96454"></script> <script language="JavaScript" type="text/JavaScript" src="/Common/GetHits.aspx?hitstype=dayhits&id=96454"></script> <script language="JavaScript" type="text/JavaScript" src="/Common/GetHits.aspx?hitstype=weekhits&id=96454"></script> <script language="JavaScript" type="text/JavaScript" src="/Common/GetHits.aspx?hitstype=monthhits&id=96454"></script> <script language="JavaScript" type="text/JavaScript" src="/Common/GetBrowseTimes.aspx?id=96454"></script> <img src="/images/star5.jpg" /> 重庆市第十八中学1重庆市2017年11月23日/UploadFiles/nopic.gif 意事项： 　 　 试题的答案书写在答题卡上 　 意事项： 　 　 试题的答案书写在答题卡上 　 　 一、选择题（本题共 12 个小题，每小题只有一个选项符合题意，每小题 3 分，共 36 分） 　 　 1 ．根据你对生活中物理量的认识，你认为下列数据符合实际情况的是（       ） 　 　 A ．一个中学生正常骑自行车的速度约 20m/s　　 【内容简介】 意事项： 　 　 试题的答案书写在答题卡上 　 　 一、选择题（本题共 12 个小题，每小题只有一个选项符合题意，每小题 3 分，共 36 分） 　 　 1 ．根据你对生活中物理量的认识，你认为下列数据符合实际情况的是（       ） 　 　 A ．一个中学生正常骑自行车的速度约 20m/s　　 B ．升国旗，演奏中华人民共和国国歌用时约 127s　　 C ．一个足球的直径约 50cm　　 D ．空气中 PM2.5 是指粒径小于或等于 2.5mm 的可入肺颗粒物 　 　 2 ． 某同学用分度值为 1cm 的刻度尺测量了一物体长度，共测量了 8 次，记录的结果如下： 5.24dm 、 5.23dm 、 5.2dm 、 5.245dm 、 5.86dm 、 5.25dm 、 5.22dm 、 5.24dm 。则该物体地点长 度是（      ） 　 　 A ． 5.233dm                 B ． 5.31dm                   C ． 5.23dm                   D ． 5.2325dm　　 3 ． 甲、乙两车匀速同向行驶，甲、乙两车的速度之比是 2:3 ，甲、乙两车行驶的时间之比是 5:2 ，则甲、乙两车行驶的路程之比是（        ） 　 　 A ． 4:6                         B ． 6:4                        C ． 5:3          　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　              D ． 3:5　　 　 　 　 　 　 　 　 　 4．如图1所示，木块丙、丁自左向右运动，现用高速摄影机在同一底片上多次曝光，记录下木块每次曝光时的位置。已知连续两次曝光的时间间隔是相等的。图1乙是两木块运动情况的s﹣t 或v﹣t 图像，根据图甲可知图乙正确的是（    ） 　 　 　 　 　 　 　 　 　 　 　 　 　 　   甲 　 　 　 　 　 　 　 　   　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　   乙 　 　 　 　 　 　 图 1　　 A                 B                  C         　　　　           D　　 　 　 　 　 5 ． 甲、乙两船相距 5km ，在同一河流同时起航，且保持船速不变。若两船同时在逆水中航行，经过时间 t 1 甲船恰好赶上乙船，若两船同时在顺水中航行，甲船赶上乙船时，需要时间 t 2 ，则（       ） 　 　 A ． t 1 =t2                B ． t 1 >t2                            C ． t 1 意事项： 　 　 试题的答案书写在答题卡上 　 　 一、选择题（ <p><em>所属专辑：</em> <a href='/Special_55/Index.aspx' target='_blank'> 《2017-2018学年八年级上学期期中考试物理试题》专辑 </a> </p> 下载地址1|sj/2017/11/201711231039528094.doc<p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span style="font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">意事项：</span> <span lang="EN-US" style="color: black"> 　 　 </span> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span style="font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">试题的答案书写在答题卡上</span> <span lang="EN-US" style="color: black"> 　 　 </span> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <b style="mso-bidi-font-weight: normal"> <span style="font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一、选择题（本题共</span> <span lang="EN-US" style="color: black">12</span> </b> <b style="mso-bidi-font-weight: normal"> <span style="font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个小题，每小题只有一个选项符合题意，每小题</span> <span lang="EN-US" style="color: black">3</span> </b> <b style="mso-bidi-font-weight: normal"> <span style="font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分，共</span> <span lang="EN-US" style="color: black">36</span> </b> <b style="mso-bidi-font-weight: normal"> <span style="font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分）</span> <span lang="EN-US" style="color: black"> 　 　 </span> </b> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">1</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．根据你对生活中物理量的认识，你认为下列数据符合实际情况的是（</span> <span style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> <span lang="EN-US"> <span style="mso-spacerun: yes">  </span> <span style="mso-spacerun: yes">  </span> </span> </span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">）</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">A</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．一个中学生正常骑自行车的速度约</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">20m/s　　</span> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">B</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．升国旗，演奏中华人民共和国国歌用时约</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">127s　　</span> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">C</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．一个足球的直径约</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">50cm　　</span> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">D</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．空气中</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">PM2.5</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">是指粒径小于或等于</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">2.5mm</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">的可入肺颗粒物</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt"> <span lang="EN-US">2</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span> <span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">某同学用分度值为</span> <span lang="EN-US">1cm</span> <span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的刻度尺测量了一物体长度，共测量了</span> <span lang="EN-US">8</span> <span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">次，记录的结果如下：</span> <span lang="EN-US">5.24dm</span> <span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span> <span lang="EN-US">5.23dm</span> <span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span> <span lang="EN-US">5.2dm</span> <span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span> <span lang="EN-US">5.245dm</span> <span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span> <span lang="EN-US">5.86dm</span> <span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span> <span lang="EN-US">5.25dm</span> <span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span> <span lang="EN-US">5.22dm</span> <span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span> <span lang="EN-US">5.24dm</span> <span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。则该物体地点长</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">度是（</span> <span style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> <span lang="EN-US"> <span style="mso-spacerun: yes">  </span> <span style="mso-spacerun: yes"> </span> </span> </span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">）</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">A</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5.233dm<span style="mso-tab-count: 3">                 </span>B</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5.31dm<span style="mso-tab-count: 3">                   </span>C</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5.23dm<span style="mso-tab-count: 3">                   </span>D</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5.2325dm　　</span> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">3</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">甲、乙两车匀速同向行驶，甲、乙两车的速度之比是</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">2:3</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">，甲、乙两车行驶的时间之比是</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5:2</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">，则甲、乙两车行驶的路程之比是（</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> <span style="mso-spacerun: yes">  </span> <span style="mso-spacerun: yes">  </span> <span style="mso-spacerun: yes"> </span> </span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">）</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">A</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">．</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">4:6<span style="mso-tab-count: 4">                         </span>B</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">6:4 <span style="mso-tab-count: 4">                       </span>C</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5:3 <span style="mso-tab-count: 2">         </span>　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　<span style="mso-tab-count: 2">              </span>D</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">3:5　　</span> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> 　 　 　 　 　 　 　 　 <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">4</span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">如图</span><span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">1</span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">所示，木块丙、丁自左向右运动，现用高速摄影机在同一底片上多次曝光，记录下木块每次曝光时的位置。已知连续两次曝光的时间间隔是相等的。图</span><span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">1</span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">乙是两木块运动情况的</span><span style="line-height: 150%; color: black; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt"></span><span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">s</span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">﹣</span><span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">t </span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">或</span><span style="line-height: 150%; color: black; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt"></span><span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">v</span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">﹣</span><span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">t </span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">图像，根据图甲可知图乙正确的是（</span><span style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"><span lang="EN-US"><span style="mso-spacerun: yes">  </span><span style="mso-spacerun: yes">  </span></span></span><span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">）</span><span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span></p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> 　 　 　 　 　 　 　 　 　 　 </p> <p> </p> <table cellpadding="0" cellspacing="0" width="100%"> <tbody> <tr> <td style="border-bottom: #f0f0f0; border-left: #f0f0f0; background-color: transparent; border-top: #f0f0f0; border-right: #f0f0f0"> <div class="shape" style="padding-bottom: 4.35pt; padding-left: 7.95pt; padding-right: 7.95pt; padding-top: 4.35pt" v:shape="文本框_x0020_23"> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"> <span style="z-index: 251648000; position: absolute; mso-ignore: vglayout"> <span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">甲</span> <span lang="EN-US"> 　 　 </span> </span> </p> </div> </td> </tr> </tbody> </table> <p> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p> <br clear="all" style="mso-ignore: vglayout" />  </p> <p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> 　 　 　 　 　 　 　 　 <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span></p> <p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> 　 　 　 　 </p> <p> </p> <table cellpadding="0" cellspacing="0" width="100%"> <tbody> <tr> <td style="border-bottom: #f0f0f0; border-left: #f0f0f0; background-color: transparent; border-top: #f0f0f0; border-right: #f0f0f0"> <div class="shape" style="padding-bottom: 4.35pt; padding-left: 7.95pt; padding-right: 7.95pt; padding-top: 4.35pt" v:shape="文本框_x0020_22"> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"> <span style="z-index: 251646976; position: absolute; left: 0pt; mso-ignore: vglayout"> <span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">乙</span> <span lang="EN-US"> 　 　 </span> </span> </p> </div> </td> </tr> </tbody> </table> <p> 　 　 　 　 </p> <table cellpadding="0" cellspacing="0" width="100%"> <tbody> <tr> <td style="border-bottom: #f0f0f0; border-left: #f0f0f0; background-color: transparent; border-top: #f0f0f0; border-right: #f0f0f0"> <div class="shape" style="padding-bottom: 4.35pt; padding-left: 7.95pt; padding-right: 7.95pt; padding-top: 4.35pt" v:shape="文本框_x0020_24"> <p class="MsoNormal" style="margin: 0cm 0cm 0pt"> <span style="z-index: 251649024; position: absolute; left: 0pt; mso-ignore: vglayout"> <span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图</span> <span lang="EN-US">1　　</span> </span> </p> </div> </td> </tr> </tbody> </table> <p> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">A<span style="mso-spacerun: yes">                 </span>B<span style="mso-spacerun: yes">                  </span>C<span style="mso-spacerun: yes">         </span>　　　　<span style="mso-spacerun: yes">           </span>D　　</span> </p> <p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p class="MsoNormal" style="line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">甲、乙两船相距</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">5km</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">，在同一河流同时起航，且保持船速不变。若两船同时在逆水中航行，经过时间</span> <i style="mso-bidi-font-style: normal"> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">t</span> </i> <sub> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">1</span> </sub> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">甲船恰好赶上乙船，若两船同时在顺水中航行，甲船赶上乙船时，需要时间</span> <i style="mso-bidi-font-style: normal"> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">t</span> </i> <sub> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">2</span> </sub> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">，则（</span> <span style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> <span lang="EN-US"> <span style="mso-spacerun: yes">  </span> <span style="mso-spacerun: yes">  </span> </span> </span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">）</span> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt"> 　 　 </span> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">A</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span> <i style="mso-bidi-font-style: normal"> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">t</span> </i> <sub> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">1</span> </sub> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">=<i style="mso-bidi-font-style: normal">t</i><sub>2</sub><span style="mso-tab-count: 3">                </span>B</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span> <i style="mso-bidi-font-style: normal"> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">t</span> </i> <sub> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">1</span> </sub> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">&gt;<i style="mso-bidi-font-style: normal">t</i><sub>2</sub><span style="mso-spacerun: yes">   </span><span style="mso-tab-count: 4">                         </span>C</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span> <i style="mso-bidi-font-style: normal"> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">t</span> </i> <sub> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">1</span> </sub> <span lang="EN-US" style="line-height: 150%; color: black; mso-bidi-font-size: 10.5pt">&lt;<i style="mso-bidi-font-style: normal">t</i><sub>2</sub><span style="mso-spacerun: yes">  </span><span style="mso-tab-count: 3">                   </span>D</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">．</span> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">以上说法都有可能</span> </p> <p align="left" class="MsoNormal" style="text-align: left; line-height: 150%; margin: 0cm 0cm 4pt; text-autospace: "> <span style="line-height: 150%; font-family: 宋体; color: black; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: MWWFFT+ËÎÌå; mso-bidi-font-size: 10.5pt">............</span> <span lang="EN-US" style="line-height: 150%; 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