发电机失磁后，向系统输送有功的多少与发电机的（）力矩特性和汽轮机的（）特性有关。

资产管理业务的主要类型有（）

A．为单一客户办理定向资产管理业务

B．为多个客户办理定向资产管理业务

C．为多个客户办理集合资产管理业务

D．为客户特定目的办理专项资产管理业务

项目信息门户实施的条件不包括（）。

A．组织件

B．教育件

C．软件

D．经济件

下颌处于休息状态时，上下牙弓自然分开成一楔形间隙称（）

A.颌间隙

B.息止间隙

C.高度

D.颌间距离

E.垂直距离

世界银行的资金来源包括()。

A.份额

B.借款

C.转让债权

D.业务净收益

E.银行股份

阅读理解。

     "Just five more minutes." "I'm tired!" "I can't get up." If you have ever had trouble getting up in the

morning, you are not alone. Many kids in the United States do not get enough sleep.

     Your body needs sleep-and lots of it! "Evidence (证据) shows that elementary-age children need at

least nine hours of sleep per night," said sleep expert Dr. Carl Hunt.

     Kids who do not sleep enough cannot do their best, experts say. A tired kid may be moody and act

badly. Being tired can also cause kids to forget things, have trouble learning, and have trouble playing

sports.

     Not sleeping enough can also affect kids' safety. Experts say children who are tired are more likely

to suffer injuries.

     Lots of kids lose sleep because they are busy. Many take part in after-school activities. Then they

go home, eat dinner, and do homework. Afterward, many kids watch TV, play video games, and surf

the Internet. That leaves less time for sleep.

     Sometimes you may not be able to go to bed early. But, if you get a choice whether to stay up late,

think twice. A good night's sleep can help you feel your best!

1. What is the best title for this story?[ ]

A. Kids Need More Sleep

B. Turn off the TV

C. Children Dream

D. Kids Have Busy Lives

2. According to the story, what is the main reason many kids do not get enough sleep? [ ]

A. They are afraid of the dark.

B. They are busy all day.

C. They get up early to do their homework.

D. They stay up late reading.

3. How could a good night's sleep help you feel your best? [ ]

A. You may be less moody.

B. You may have an easier time learning.

C. You may be less likely to get injured.

D. All of the above.