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5.四面体的顶点和各棱中点共10个点,其两两连线可组成异面直线的对数为BA.83  B.87   C.91  D.95 

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4.上、下两个底面平行且都是长方形,四个侧面都是全等的等腰梯形的六面体D

A.是不存在的  B.是正四棱台  C.是四棱台但可能不是正四棱台     D.存在但可能不是正棱台

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3.一个三棱锥的所有棱长都是1,那么这个三棱锥在平面α上的射影的面积不可能是BA B C  D

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2.在等差数列{an}中,a1,从第10项开始比1大,记,则t的取值范围是D

 A.    B.    C.    D.

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1.单位有六个科室,现招聘来4名新毕业的大学生,要随机安排到其中的两个科室且每科室2名,则不同的安排方案种数为DA. B.  C.  D.

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11.(09江苏) He did not regret saying what he did but felt that he      it differently.

A. could express             B. would express

C. could have expressed         D. must have expressed

[答案]C

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10.(09全国2) I can’t leave. She told me that I      stay here until she comes back.

A. can    B. must   C. will   D. may

[答案]B

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9.(09重庆)  -Hi, Tom. Any idea where Jane is?

-She_____in the classroom. I saw her there just now.

A. shall be  B. should have been

C. must be   D. might have been

[答案]C

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8.(09天津) This printer is of good quality. If it _______ break down within the first year, we would repair it at our expense.

A. would      B. should   C. could    D. might

[答案]B

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7.(09四川) -I don’t care what people think.

-Well, you _______

A. could   B. would  C. should     D. might

[答案]C

[解析]考查情态动词的用法。答话的人提了一个建议--你应该关注别人对你的评价的。should可以用来向别人提建议,所以答案为:C

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