0  246193  246201  246207  246211  246217  246219  246223  246229  246231  246237  246243  246247  246249  246253  246259  246261  246267  246271  246273  246277  246279  246283  246285  246287  246288  246289  246291  246292  246293  246295  246297  246301  246303  246307  246309  246313  246319  246321  246327  246331  246333  246337  246343  246349  246351  246357  246361  246363  246369  246373  246379  246387  447090 

26. ______ hungry I am, I never seem to be able to finish off this loaf of bread.

  A. However        B. Whenever     C. Wherever      D. Whatever

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25. ---I’m sure Andrew will come out first in this gymnastic competition.

  ---I think so. He ______  for it for months.

  A. is preparing    B. was preparing     C. had been preparing    D. has been preparing

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24. ----I can’t finish the paper until tomorrow, I’m afraid.   ----That’s OK, there’s ______.

A. no problem    B. no hurry     C. no doubt         D. no wonder

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23. Thank you for all your hard work in the rescue after the earthquake. I don’t think we ______ it without you.

  A. can survive     B. could survive     C. could have survived   D. may have survived

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22. _______ is put in the report,  the new machine will work twice as fast, thus reducing costs.

  A. That      B. Which         C. As           D. What

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第一节:单项填空(共20小题;每小题0.5分,满分10分)

21. In some places in the South of China, ______car has already become _____ popular means of

  transportation.

  A. the; a        B. /; a       C. a; the        D. the; the

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22.(本题满分15分)已知函数,其中

(1)    若是函数的极值点,求实数的值;

(2)    若对任意的(为自然对数的底数)都有成立,求实数的取值范围。

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21.(本题满分15分)已知抛物线的准线与轴交于点,为抛物线的焦点,过点斜率为的直线与抛物线交于两点.

(1)若,求的值;

(2)是否存在这样的,使得抛物线上总存在点满足,若存在,求的取值范围;若不存在,说明理由 。

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20.(本题满分14分)正方体,,为棱的中点,

(1)求证:

(2)求证:;

(3)求三棱锥的体积.

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19.(本题满分14分)等差数列的前项和记为。已知。

 (1)求数列的通项;

 (2)若,求;

 (3)令,求数列的前项和。

 

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