Wang Hui ishis mother on his cell phone.

社会主义法制的核心是（　　）。

A．有法可依　

B．有法必依

C．执法必严

D．违法必究

对各型糖尿病人的治疗，最基本的方法是

A．卧床休息
B．饮食控制
C．口服降糖药
D．注射胰岛素
E．纠正酸中毒

阅读理解。

     The Internet is not perfect. There are many problems with it.

     The Internet is not organized. There is no one in charge of the Internet. It is sometimes difficult to find

what you are looking for. It is also easy to get the wrong information on the "Net".

     Some businessmen cheat people on the Internet. Internet thieves can steal credit card numbers. Some

advertisers send spam to e-mail boxes. E-mail boxes are often filled with these unwanted advertisements.

     Illegal businesses can operate on the Internet. These businesses sell X-rated materials, cigarettes and

alcohol to teenagers.

     The Internet has websites with information about making bombs, breaking the law and terrorism.

Criminals can fool people, especially children, in chat rooms. They can spread poisonous information and

attack new members.

     The Internet is the greatest advance in communication since human emerged. But it can also like a dark alley in a dangerous part of town. Parents need to set parental controls on their children when they use the Internet. This will keep some of the bad material away from their children.

     The Internet can be dangerous to computers, too. Some people who have evil intentions enjoy causing problems for other people they don't even know. They create computer viruses. A computer can get virus by downloading a program that has a virus in it. Some virus come by e-mail.

     A virus can destroy the data a person has saved in computer files. A virus can cause a computer to

crash. A virus can also reproduce itself! It can send copies of itself to everyone on a person's e-mail

address list. Then these people's will have the same problems and can't work normally!

1. Why can illegal businesses operate on the Internet?

A. Because some people like to buy banned products on the Internet.

B. Because there is no one in charge of the Internet.

C. Because X-rated materials, cigarettes, alcohol and so on can be sold well on the Internet.

D. Because people who operate businesses on the Internet are criminals.

2.  Parental controls are needed when children use the Internet because________

A. poisonous information may have a bad effect on children

B. children may damage the computers

C. the Internet is always unsafe for the children

D. children can't use the computers well

3.  We can infer from the passage that the key to solving the problems with the Internet is_____.

A. to improve the computers  

B. to find a medicine to kill computer viruses

C. to order people not to use the Internet  

D. to improve people's moral level(道德水平).

为了防止拱式桥不规则裂缝的出现，需在相对变形较小的位置设置( )。

A．钢板连接

B．伸缩缝

C．企口混凝土铰

D．变形缝

运用利率调节经济的重要条件是借贷双方（）。

A、有各自独立的经济利益

B、没有独立的经济利益

C、不以盈利为目的

D、谋求经济利益E、从事生产经营活动