0  418279  418287  418293  418297  418303  418305  418309  418315  418317  418323  418329  418333  418335  418339  418345  418347  418353  418357  418359  418363  418365  418369  418371  418373  418374  418375  418377  418378  418379  418381  418383  418387  418389  418393  418395  418399  418405  418407  418413  418417  418419  418423  418429  418435  418437  418443  418447  418449  418455  418459  418465  418473  447090 

7.函数的定义域为[a,b],值域为,则b-a的最大值和最小值之和为( B)

A.       B.     C.        D.

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6.已知直线a、b都在平面M外,a、b在平面M内的射影分别是直线a1、b1,给出下列四个命题:①  ②  ③ 

④其中不正确的命题的个数是:                   ( D ) 

     A.1            B.2             C.3             D.4

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5.函数的图象大致是                    (  D)   

    A.        B.         C.        D.

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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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