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
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
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
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.
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.
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
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
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
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
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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