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1、题目2:已知等差数列 {an} 中,a3+a4+a5=12 ,那么a1+a2+…+a7=( )

A、14

B、21

C、28

D、35

答案:C

高中知识复习题库
1、题目28:I saw Jeff in the park.He () on the grass and reading a book.
https://www.shititong.cn/cha-kan/shiti/0005dd23-8dbd-7980-c0c7-f71e22d02304.html
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1、题目17:不等式8-x2<-1的解集是( )
https://www.shititong.cn/cha-kan/shiti/0005dd36-d705-0c30-c0c7-f71e22d02310.html
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1、题目78:--It’s said that a new highway has been completed. --Yes,but we don’t konw () it’s to be opened to traffic soon.
https://www.shititong.cn/cha-kan/shiti/0005dd23-8dbd-7d68-c0c7-f71e22d02316.html
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1、题目23:下列关于空集∅的叙述:①0∉∅;②∅∈∅;③∅=0.正确的个数是( )
https://www.shititong.cn/cha-kan/shiti/0005dd36-d705-0c30-c0c7-f71e22d02316.html
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1、题目99:--How can we live a greener life? --We should save () energy and reduce pollution.
https://www.shititong.cn/cha-kan/shiti/0005dd23-8dbd-8150-c0c7-f71e22d0230b.html
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1、题目113:--Your name again?I () catch it. --Henry Smith.
https://www.shititong.cn/cha-kan/shiti/0005dd23-8dbd-8150-c0c7-f71e22d02319.html
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1、题目54:y=cos(x/2)的周期为( )
https://www.shititong.cn/cha-kan/shiti/0005dd36-d705-1018-c0c7-f71e22d0231b.html
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1、题目14:在等比数列{an}中,已知a7·a12=5,则a8·a9·a10·a11=( )
https://www.shititong.cn/cha-kan/shiti/0005dd36-d705-0c30-c0c7-f71e22d0230d.html
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1、题目38:() important it is for kids to imagine freely!
https://www.shititong.cn/cha-kan/shiti/0005dd23-8dbd-7980-c0c7-f71e22d0230e.html
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1、题目90:What () good news!Our school band(乐队)will play at Harbin Summer Concert in
https://www.shititong.cn/cha-kan/shiti/0005dd23-8dbd-8150-c0c7-f71e22d02302.html
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高中知识复习题库

1、题目2:已知等差数列 {an} 中,a3+a4+a5=12 ,那么a1+a2+…+a7=( )

A、14

B、21

C、28

D、35

答案:C

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1、题目28:I saw Jeff in the park.He () on the grass and reading a book.

A.  sits

B.  sat

C.  is sitting

D.  was sitting

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1、题目17:不等式8-x2<-1的解集是( )

A.  {x|-3<x<3}

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C.  {x|-3≤x<3}

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1、题目78:--It’s said that a new highway has been completed. --Yes,but we don’t konw () it’s to be opened to traffic soon.

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1、题目99:--How can we live a greener life? --We should save () energy and reduce pollution.

A.  no

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1、题目113:--Your name again?I () catch it. --Henry Smith.

A.  don't

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1、题目14:在等比数列{an}中,已知a7·a12=5,则a8·a9·a10·a11=( )

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