自主录题

自主录题一试题标签

省市校区

阶段科目

题型题类

年份题源

存放类型

已选考点

难度系数

一星二星三星四星五星

在线训练

是否

自主录题一试题内容

试题内容

<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">今年植树节，某校开展了“植树造林，从我做起”的植树活动．该校参加本次植树活动的全体学生被分成了</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">115</span></span><span style="line-height:150%"><span style="font-family:新宋体">个植树小组，按学校要求，每个植树小组至少植树</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">10</span></span><span style="line-height:150%"><span style="font-family:新宋体">棵．经过一天的植树活动，校团委为了了解本次植树任务的完成情况，从这</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">115</span></span><span style="line-height:150%"><span style="font-family:新宋体">个植树小组中随机抽查了</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">10</span></span><span style="line-height:150%"><span style="font-family:新宋体">个小组，并对这</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">10</span></span><span style="line-height:150%"><span style="font-family:新宋体">个小组植树的棵数进行了统计，结果如下：</span></span></span></span></span><br />
<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">根据以上提供的信息，解答下列问题：</span></span></span></span></span><br />
<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">（</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">1</span></span><span style="line-height:150%"><span style="font-family:新宋体">）求所统计的这组数据的中位数和平均数；</span></span></span></span></span><br />
<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">（</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">2</span></span><span style="line-height:150%"><span style="font-family:新宋体">）求抽查的这</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">10</span></span><span style="line-height:150%"><span style="font-family:新宋体">个小组中，完成本次植树任务的小组所占的百分比；</span></span></span></span></span><br />
<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">（</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">3</span></span><span style="line-height:150%"><span style="font-family:新宋体">）请你估计在本次植树活动中，该校学生共植树多少棵．</span></span></span></span></span><br />
                                                                                                                         <img height="155" src="/uploads/meth/20210114/26785bf551eaffc4dd694f08ff6c7a5a.png" width="193" />

题型种类

选择题 非选择题

选项效果

一行4选项 一行2选项 一行1选项

选项内容

A B C D E F G H

选择答案

自主录题一试题解答

试题解答

<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">解：（</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">1</span></span><span style="line-height:150%"><span style="font-family:新宋体">）∵</span></span></span></span></span><img height="35" src="/uploads/meth/20210114/af8fc13f484a9b2fdeadfdc22d7aa311.png" width="45" /><span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">＝</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">10.5</span></span><span style="line-height:150%"><span style="font-family:新宋体">（棵）；</span></span></span></span></span><br />
<img height="18" src="/uploads/meth/20210114/69bc93aa5f5d47b60df33b981e442241.png" width="10" /><span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">＝</span></span></span></span></span><img height="35" src="/uploads/meth/20210114/9a06d501ed27810b13beb8dcc6baa616.png" width="181" /><span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">＝</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">10.6</span></span><span style="line-height:150%"><span style="font-family:新宋体">（棵）．</span></span></span></span></span><br />
<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">∴所统计的这组数据的中位数为</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">10.5</span></span><span style="line-height:150%"><span style="font-family:新宋体">棵，平均数为</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">10.6</span></span><span style="line-height:150%"><span style="font-family:新宋体">棵．</span></span></span></span></span><br />
<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">（</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">2</span></span><span style="line-height:150%"><span style="font-family:新宋体">）∵</span></span></span></span></span><img height="35" src="/uploads/meth/20210114/e5c547c8b60b1742a98b755cfdf0ead3.png" width="45" /><span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">×</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">100%</span></span><span style="line-height:150%"><span style="font-family:新宋体">＝</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">90%</span></span><span style="line-height:150%"><span style="font-family:新宋体">．</span></span></span></span></span><br />
<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">∴在抽查的</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">10</span></span><span style="line-height:150%"><span style="font-family:新宋体">个小组中，</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">90%</span></span><span style="line-height:150%"><span style="font-family:新宋体">的小组完成了植树任务．</span></span></span></span></span><br />
<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">（</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">3</span></span><span style="line-height:150%"><span style="font-family:新宋体">）∵</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">10.6</span></span><span style="line-height:150%"><span style="font-family:新宋体">×</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">115</span></span><span style="line-height:150%"><span style="font-family:新宋体">＝</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">1219</span></span><span style="line-height:150%"><span style="font-family:新宋体">（棵）．</span></span></span></span></span><br />
<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="line-height:150%"><span style="font-family:新宋体">∴估计在本次植树活动中，该校学生共植树</span></span><span lang="EN-US" style="line-height:150%"><span new="" roman="" style="font-family:" times="">1219</span></span><span style="line-height:150%"><span style="font-family:新宋体">棵．</span></span></span></span></span>

自主录题一试题点评

智能点评

手动点评