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问题 选择题
已知函数f（x）=ax，（a＞0，a≠1）的图象经过点P(
1
2
，
1
2
)，则常数a的值为（　　）
A．2B．4C．
1
2
D．
1
4
答案

∵函数f（x）=ax，（a＞0，a≠1）的图象经过点P(

1
2
，
1
2
)，

∴a

1
2
=
1
2
，⇒a=
1
4
．

故选D．

填空题

拼写单词，根据句子意思，在空格中填写适当的单词，使句子完整、正确。

1. Do you mind if I open the window? Not in the _______. Please do.

2. There are five _______ on each hand.

3. I won't read that kind of books. It's a _______ of time.

4. How do you get along _______ the new students?

5. You should think it over before you make the _______.

6. I've written several letters to him, but he _______ to none of them.

7. Don't _______ about him. He is already fifteen years old.

8. The homework isn't difficult at all. You can _______ finish it before 5:00 pm.

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选择题

中国民族工业兴起于[ ]

A．19世纪三四十年代

B．19世纪四五十年代

C．19世纪六七十年代

D．19世纪七八十年代

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