心理学研究表明，过度学习为多少时学习效果最佳？（） A．50% B．100% C．1

The Healthy Habits Survey shows that only about one third of American seniors have correct habits. Here are some findings and expert advice.

1. How many times did you brush your teeth yesterday?

Finding：A full 33% of seniors brush their teeth only once a day.

Step：Remove the 300 types of bacteria in your mouth each morning with a battery-operated toothbrush.

Brush gently for 2 minutes, at least twice a day.

2. How many times did you wash your hands or bathe yesterday?

Finding：Seniors, on average, bathe fewer than 3 days a week. And nearly 30% wash their hands only 4 times a day----half of the number doctors recommend.

Step：We touch our faces around 3,000 times a day-often inviting germs(病菌)to enter our mouth, nose, and eyes. Use toilet paper to avoid touching the door handle. And, most important, wash your hands often with hot running water and soap for 20 seconds.

3. How often do you think about fighting germs?

Finding：Seniors are not fighting germs as well as they should.

Step：Be aware of germs. Do you know it is not your toilet but your kitchen sponge(海绵)that can carry more germs than anything else? To kill these germs, keep your sponge in the microwave for 10 seconds.

小题1:What is found out American seniors?

A．Most of then have good habits.

B．Nearly 30% of then bathe three days a week.

C．About one third of them brush their teeth only once a day

D．All of then are fighting germs better than expected..小题2:Doctors suggest that people should wash their hands     .

A．eight times a day

B．three times a day

C．four times a day

D．twice a day小题3:Which of the following is true according to the text?

A．We should keep from touching our faces.

B．There are less than 300 types of bacteria in the mouth.

C．A kitchen sponge can carry more germs than a toilet.

D．We should wash our hands before touching a door handle.小题4:The text probably comes from       .

A．a guide book

B．a popular magazine

C．a book review

D．an official document

某直辖市单独编制的城市人防建设规划，直辖市要报( )审批。

A．直辖市人民政府

B．国务院

C．国家人民防空委员会

D．建设部

E．直辖市人民防空办公室

下列关于操作风险的说法，不正确的是( )。

A．操作风险普遍存在于商业银行业务和管理的各个方面

B．操作风险具有非营利性，它并不能为商业银行带来盈利

C．对操作风险的管理策略是在管理成本一定的情况下尽可能降低操作风险

D．操作风险具有相对独立性，不会引发市场风险和信用风险

三七、五灵脂的功效共同点是（）

A.活血祛瘀，行气止痛

B.活血祛瘀，祛风除湿

C.活血止痛，化瘀止血

D.活血行气，祛风除湿

应急演练参与人员在演习过程中有不同的分工，通常分为参演人员、（）、模拟人员、评价人员和观摩人员。

A.联络人员

B.治安人员

C.控制人员

D.后勤人员