相对于其他有效组合，最优证券组合所在的无差异曲线的（）。 A.位置最低 B.位置最高

阅读理解。

     You're welcome, ladies and gentlemen. Everything in our restaurant is cheap and delicious. Let's have

a look. For breakfast, you can eat porridge, eggs and noodles. For lunch and dinner, you can have rice,

dumplings, different kinds of meat and vegetables. There are also some drinks for you. Come and have

a meal, please. It's a good place to enjoy yourself.

     Breakfast: porridge ($1.00), egg ($1.00), noodles ($2.50--$5.00).

     Lunch and dinner: rice ($1.00), dumplings ($5.00), egg ($1.00), cabbage ($6.00), carrots ($8.00),

potatoes($8.00), chicken ($12.00), fish ($15.00),mutton ($18.00), green tea ($2.00), iced tea ($3.00),

orange juice ($4.00).

    Business hours: Mon.--Fri. 6:30 a.m.--9:30 p.m.; Sat.--Sun. 7:00 a.m.-- 10:00 p.m..

1. What can you eat for breakfast in the restaurant ________.

A. Dumplings.

B. Beef noodles.

C. Ice cream.

D. French fries.

2. You can have a meal in the restaurant ________.

A. at 6:40 on Saturday morning

B. at 9:45 every evening

C. at 11:30 every morning

D. at 11:30 on Sunday night

3. If you have rice, cabbage and green tea for lunch, you need to pay ________.

A. $8

B. $9

C. $10

D. $11

4. Mr. Black goes to the restaurant with $22 for dinner. He can order rice, potatoes, chicken and ________.

A. iced tea

B. orange juice

C. green tea

D. an egg

5. What does the speaker probably (可能) do?

A. A reporter.

B. A clerk.

C. A waiter.

D. An actor.

许多心理治疗方法中强调成功治疗的最为关键的因素是

A．良好的医患关系

B．保密性原则

C．针对性原则

D．灵活性原则

E．完善的治疗计划

下列关于规范化理论的叙述中，( )是不正确的。
Ⅰ．规范化理论研究关系模式中各属性之间的依赖关系及其对关系模型性能的影响
Ⅱ．规范化理论提供判断关系模型优劣的理论标准
Ⅲ．规范化理论对于关系数据库设计具有重要指导意义
Ⅳ．规范化理论只能应用于数据库逻辑结构设计阶段
∨．在数据库设计中有时候会适当地降低规范化程序而追求高查询性能

A．仅Ⅰ和Ⅱ

B．仅Ⅱ和Ⅲ

C．仅Ⅳ

D．仅∨

尿培养检查的尿标本采集后，处理时间为

A．2小时以内
B．4小时以内
C．6小时以内
D．8小时以内
E．10小时以内