以下哪些物质可以增加透皮吸收性 A．月桂氮革酮 B．聚乙二醇 C．二甲基亚砜 D．薄

按要求完成下列句子。

1. The students should wear their uniforms at school. (改为同义句)

    The students are _____ _____ wear their uniforms at school.

2. His father went out and didn't say a word. (改为同义句)

    His father went out _____ _____ a word.

3. Wei Hua has learned two kinds of foreign languages by herself. (改为同义句)

    Wei Hua has _____ _____ two kinds of foreign languages.

4. Yesterday he received Tom's e-mail. (就划线部分提问)

    _____ did he _____ e-mail?

5. You are supposed to bow in Korea. (改为否定句)

    You _____ _____ to bow in Korea.

关于Bell现象的描述正确的是（）

A.额纹消失

B.用力闭眼时眼球转向外上方，露出白色巩膜

C.眼睑闭合不全

D.口角下垂

E.鼻唇沟变浅

以下哪一种药材粉末在镜检时无草酸钙结晶（）

A.大黄

B.黄芪

C.甘草

D.牛膝

E.人参

你在交通灯前准备向右转弯，交通灯上显示一个指向右边的红色箭头；你应当（）。

A、继续开，但是要给所有对面来车让行

B、停车等待绿色箭头

C、只有在安全的情况下才往前开

D、往前开，因为所有对面来车都被停住了

水泵串联运行的目的是为了增加泵的（）。 

A.扬程

B.流量

C.允许吸上真空度

D.能量。