0  255441  255449  255455  255459  255465  255467  255471  255477  255479  255485  255491  255495  255497  255501  255507  255509  255515  255519  255521  255525  255527  255531  255533  255535  255536  255537  255539  255540  255541  255543  255545  255549  255551  255555  255557  255561  255567  255569  255575  255579  255581  255585  255591  255597  255599  255605  255609  255611  255617  255621  255627  255635  447090 

24._________, my tears couldn’t help raining down my cheeks.

A.Hearing the touching news   B.Having heard the touching news

   C.After I heard the touching news  D.I had heard the touching news

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23.Most experts predict that all these changes will lead to a strong and powerful China, ________ that can surprise the whole world.

A.what    B.one  C.the one    D.which

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22.- Why don’t you take a taxi there? It’ll save you a lot of time.

   - _________.

  A.Thank you anyway!    B.Yes, let’s.

   C.Good idea!      D.That’s all right.

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第一节 单项选择(共15小题;每小题1分,满分15分)

从A、B、C、D四个选项中,选出可以填入空白处的最佳选项

21.X-rays were first discovered by _______ German scientist, Wilhelm K.Rontgen, in 1895, almost by ________ accident.

   A. the, /   B.a, an    C.a, /   D.the, the

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22.三棱柱ABC-A1B1C1中,AB⊥侧面BB1C1C,E在棱CC1上,E不在C、C1处,AE⊥EB1,已知AB=,BB1=2,BC=1,

(1)求异面直线AB与EB1的距离

(2)求A-EB1-A1的正切值

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21.四棱锥P-ABCD,底面是直角梯形,∠ABC=∠BCD=900,AB=BC=PB=PC=2CD,面PBC⊥面ABCD

  (1)求P-BD-C大小

(2)证明:面PAD⊥平面PAB

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20.棱长为4的正方体AC1中,O是A1B1C1D1中心,P在棱CC1上,且CC1=4CP,O在D1AP上的射影为H。

(1)证明:D1H⊥AP

(2)求点P到面ABD1的距离

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19.正三棱柱ABC-A1B1C1各棱长都为1,M是底面上BC边的中点,N在侧棱CC1上,且

(1)求证:AB1⊥MN

(2)求M点到直线AB1的距离。

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