CO2超临界流体萃取法的优点不包括A．提取物一般无有机溶剂残留B．适用于对热不稳定成

阅读小天地。

      Wang Hong is a Chinese girl. Her mother is a doctor. Her father is a police officer. They're in the U. S.

now. They're having fun in New York. New York is a beautiful city. They buy many clothes and toys there.

Tomorrow they will go to Washington, D. C., the capital city of the U. S.

根据短文内容，回答下列问题。

1. What does Wang Hong's mother do?

______________________________________________________________

2. Is Wang Hong a girl?

______________________________________________________________

3. Where are they now?

______________________________________________________________

4. What do they buy in New York?

______________________________________________________________

5. What's the capital city of the U. S.?

______________________________________________________________

完成光路图，并标出入射角和反射角的度数．

对注水井改变工作制度操作叙述错误的是（）。

A.注水井工作制度必须连续、平稳

B.压力升降速度平稳

C.配水间和井口倒流程是要先关后开

D.严禁猛开猛关

下列关于计算机软件版权的说法，正确的是（）

A、计算机软件受法律保护是多余的

B、正版软件太贵，软件能复制就不必购买

C、受法律保护的计算机软件不能随便复制

D、正版软件只要能解密就能随便复制

八脉交会穴中通于阴维脉的是（）。

A.列缺

B.内关

C.照海

D.公孙

E.大陵