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问题 单项选择题

除当事人另有约定的外，行纪人处理委托事务支出的费用，由（）负担。

A.行纪人

B.委托人

C.买受人

D.出卖人

答案

参考答案：A

解析：参见《合同法》第四百一十五条规定。

填空题

用所给动词的适当形式填空。

1. He usually _____ (get) up early, but he _____ (get) up very late this morning.

2. Tom says he _____ (leave) for Beijing next week if it _____ (not rain).

3. I was doing my homework when the light _____ (go) out.

4. Mr. Smith isn’t in at the moment. He _____ (leave) a moment ago.

5. The students all _____ (stop) talking when the teacher _____ (come) in.

6. He _____ (lose) his pen when he _____ (take) a walk in the park.

7. _____ you _____ (see) a horse with one eye?

8. Li Ping _____ (be) to Taiwan twice.

9. She _____ (lend) them some money several weeks ago. But they _____

(not give) it back.

10. How often _____ Lucy _____ (help) Granny Wang to clean the house?
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选择题
已知函数y=f（x）的定义域为D，若对于任意的x1，x2∈D（x1≠x2），都有f(
x1+x2
2
)＜
f(x1)+f(x2)
2
，则称y=f（x）为D上的凹函数．由此可得下列函数中的凹函数为（　　）
A．y=log2xB．y=
x
C．y=x2D．y=x3
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