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4.在中,,则是    (  C )

A.正三角形   B.锐角三角形   C.直角三角形   D.钝角三角形

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3.在等差数列中,若,则的值为( C  )

A.14      B.15       C.16       D.17

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2.已知a是非0实数,则“a>1”是“”的            (  A )

A.充分不必要条件  B.必要不充分条件 C.充要条件  D.既不充分也不必要条件

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1.不等式的解集是                   (  D  )

A.(-1,3)                 B.(-3,1)(3,7)

C.(-7,-3)                D.(-7,-3)(-1,3)

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25.The book didn’t        children probably because the author employed too many scientific terms in it.

  A.apply to        B.appeal to       C.intend to       D.lead to

  答案  C

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24.For the moment notice was     of nuclear talks between Iran and some western countries.

  A.paid          B.taken        tered        D.given

  答案  B`

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23.Newadays many teenayers want to    from their parents and live a life       being controued.

  A.break away;free from              B.break up;free of   

C.break off;opposed to              D.break down;instead of

  答案  A

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22. When I was in kindergarten,I was often   by my teachers to be polite to the adults.

   A.demanded        B.reminded        C.allowed        D.hoped

   答案  B

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21.The film star is content with herself,and she always likes to    her nice figure by wearing

  tight dresses in public.

  A.get off         B.show off        C.put off        D.turn off

  答案  B

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20.They are still    the missing child,who disappeared last Sunday after attending her friend’s birthday party.

  A.asking for       B.calling for      C.hunting for      D.sending for

  答案  C

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