1.单选题- (共12题)




A.横坐标伸长到原来的![]() |
B.横坐标缩短为原来的![]() |
C.纵坐标伸长到原来的![]() |
D.纵坐标缩短到原来的![]() |
①从15种疫苗中抽取5种检测是否合格.
②某中学共有480名教职工,其中一线教师360名,行政人员48名,后勤人员72名.为了解教职工对学校校务公开方面的意见,拟抽取一个容量为20的样本.
③某中学报告厅有28排,每排有35个座位,一次报告会恰好坐满了听众,报告会结束后,为了听取意见,需要请28名听众进行座谈.
较为合理的抽样方法是( )
A.①简单随机抽样, ②分层抽样, ③系统抽样 | B.①简单随机抽样, ②系统抽样, ③分层抽样 |
C.①系统抽样,②简单随机抽样, ③分层抽样 | D.①分层抽样,②系统抽样, ③简单随机抽样 |

A.640 | B.520 | C.280 | D.240 |
2.选择题- (共2题)
believes bad alone realized games |
Last term,Peter was {#blank#}1{#/blank#} at home.His parents were doing busines in another city. He felt lonely,so he often turned on the computer and played computer {#blank#}2{#/blank#}. However, sitting in front of the computer for a long time is {#blank#}3{#/blank#} for him. And he spent little time on his study.He failed his exams.Luckily,his parents {#blank#}4{#/blank#} his problem in time.They decided to come back home.Peter studies hard now.So far,he has made progress in his study.He {#blank#}5{#/blank#} he can catch up with his classmates soon.
believes bad alone realized games |
Last term,Peter was {#blank#}1{#/blank#} at home.His parents were doing busines in another city. He felt lonely,so he often turned on the computer and played computer {#blank#}2{#/blank#}. However, sitting in front of the computer for a long time is {#blank#}3{#/blank#} for him. And he spent little time on his study.He failed his exams.Luckily,his parents {#blank#}4{#/blank#} his problem in time.They decided to come back home.Peter studies hard now.So far,he has made progress in his study.He {#blank#}5{#/blank#} he can catch up with his classmates soon.
3.填空题- (共4题)
4.解答题- (共6题)









(1)已知平面内点







(2)设平面内曲线




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【1】题量占比
单选题:(12道)
选择题:(2道)
填空题:(4道)
解答题:(6道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:0
7星难题:0
8星难题:0
9星难题:22