企业经营之道是企业文化的核心，是企业中最宝贵的精神财富。

用情态动词can，may， must的适当形式填空。

1. —What _____ I do for you? 

    —I want some apples.

2. My father _____ ride a bike, but he drives a car.

3. You are ill, Tom. You _____ see a doctor.

4. Children _____ play football in the street.

5. If you are not careful, a car _____ hit you.

6. —_____ I come in? 

    —Come in, please.

7. A blind man _____ see anything.

8. Please ask the policeman, for he _____ know the way to

    the hospital, I'm sure.

9. —May I use your telephone? 

    —No, you _____.

妇人产后具有下列那些显著的特点（）

A.多瘀证

B.多热证

C.多虚证

D.多实证

E.易外感

成人每天分泌的小肠液量为()

A．100～200ml

B．300～400ml

C．500～600ml

D．1000～3000ml

E．4000～5000ml

简述记忆的系统。

山茵陈丸功效与作用