下列染毒途径中,吸收速度最快的为() A.经消化道 B.经呼吸道 C.经肌内注射 D

题型:单项选择题 A1型题

问题:

下列染毒途径中,吸收速度最快的为()

A.经消化道

B.经呼吸道

C.经肌内注射

D.经腹腔注射

E.经皮肤

考点:相关专业知识卫生毒理学概述卫生毒理学概述题库
题型:单项选择题 A1型题

已知关于x的方程(1-a)x2+(a+2)x-4=0,a∈R,求:

(Ⅰ)方程有两个正根的充要条件

(Ⅱ)方程至少有一个正根的充要条件.

题型:单项选择题 A1型题

词汇。

1. He is an h_______ boy, he never tells a lie.

2. He said that he p_______ the homeless people with some money.

3. The s_______ by the road said "No parking".

4. The company was e_______ in 1860.

5. He c_______ up with an idea to the problem and told us.

6. Only Tony didn't f_______ from that house while the earthquake took place.

7. It is important to dream, so _______ (坚持) your dreams.

8. I don't like to _______ (闲逛) in the street.

9. Picture story cartoons are very _______ (受人欢迎的) in the world.

10. People like to _______ (花费) many beautiful hours walking along the river.

题型:单项选择题 A1型题

扩展名为dbf的文件是( )。

A. 表文件

B. 表单文件

C. 数据库文件

D. 项目文件

题型:单项选择题 A1型题

先存款、后消费、不能透支的银行卡属于()

A、借记卡

B、贷记卡

C、准贷记卡

D、信用卡

题型:单项选择题 A1型题

小腿的截肢理想部位是()

A.上1/4处

B.中1/3处

C.上1/5处

D.1/2处

E.以上均不对

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