检修设备顶部时，利用防护栏杆或围挡等作为登高工具是允许的（）

对因血管内容量减少造成的早期肾前性氮质血症患者，首选的处理措施是（）

A.积极利尿

B.充分扩容

C.预防性血液透析

D.预防性腹膜透析

E.使用缩血管药物

当呼吸肌出现疲劳时，呼吸会变得快而浅。

王力是个足球迷，看一场重要比赛时，当自己喜欢的球队进球时，他欢呼雀跃，并且面红耳赤、心跳加快、血压升高。在这个变化过程中，起调节作用的是  （  ）

A．神经调节和激素调节

B．神经调节

C．激素调节

D．血液调节

阅读理解。

     Hi, dear boys and girls! Do you know how to be a healthy kid? Here are some rules you should follow.

     First, eat different foods, especially fruit and vegetables. You may have a favorite food, but you'd better

eat something different, if you eat different foods, you will probably get more nutrients (营养物质) your

body needs.

     Then, drink water and milk as often as possible. When you're really thirsty, cold water is the No. l choice.

Milk is a great drink that can give you more calcium (钙) your body needs to grow strong bones.

     Next, listen to your body. How do you feel when you are full? When you are eating, notice how your body

feels and when your stomach feels comfortably full. Eating too much will not make you feel comfortable and

make you fat.

     Afterwards, limit (限制) screen time. Screen time is the time you watch TV, DVDs and videos, or using

computers. It is good to take more exercise such as basketball, bike riding and swimming. You can't watch

TV for more than two hours a day.

     Finally, be active. One thing you'd like to do as a kid is to find out which activity you like best. Find ways

to be active every day.

     Follow these rules and you can be a healthy kid.

1. You have to eat different kinds of foods especially _____. [ ]

A. meat 　　

B. hamburgers　

C. sweets

D. fruit and vegetables　

2. Which kind of drinks can give you more calcium? [ ]

A. Juice.　　

B. Milk.　　　　

C. Cold water.　

D. Tea.

3. According to the passage, how many rules should you follow if you want to be healthy? [ ]

A. Five.　　

B. Nine.　　　　　

C. Fifteen.　　　

D. Thirteen.

4. According to the passage, which of the following is TRUE? [ ]

A. When you're eating, you don't have to pay attention to how your body feels.

B. You can eat your favorite food as much as you can.

C. You can watch TV whenever you like to get more information.

D. We should try to live in an active way in our life.

5. Which is the best title of the passage? [ ]

A. How to make yourself popular

B. How to be a healthy kid

C. How to be a popular kid

D. How to make your parents healthy

EPON系统采用WDM技术，其传输波长有哪些？（）

A.1310

B.1490

C.1550

D.1620