DIC初期选用 A．叶酸 B．甲酰四氢叶酸钙 C．维生素B12 D．右旋糖酐铁 E．

阅读理解。

     Many children use the Internet to get useful knowledge and information, and to relax in their free time.

But some of them are not using it in a good way. Here are some rulers to make sure you are safe and have

fun on the Internet.

     ● Make rules for Internet use with your parents. For example, when you can go on line, for how long

and what activities you can go online.

     ● Don't give your password (密码) to anyone else,and never give out the following informatin-your

real name,home address, age, school, phone number or other personal information.

     ● Check with your parents before giving out a credit card (信用卡) number.

     ● Never send a phone of yourself to soneone in e-mail unless your parents say it's OK.

     ● Check with your parents before going into a chat room.Different chat rooms have different rules and

attract different kinds of people. You and your parents will want to make sure it's a right place for you.

     ● Never agree to meet someone you meet on the Internet without your parents'permission. Never meet

anyone you met on line alone.

     ● Always remember that people online may not be who they say they are. Treat everyone online as

strangers.

     ● If something you see or read online makes you uncomfortable, leave the site. Tell a parent or teacher

right away.

     ● Treat other people as you'd like to be treated. Never use bad language.

     ● Remember-not everything you read on the Internet is true.

1. The writer tells children to ______. [ ]

A. send their photos to him

B. make rules for Internet use with parents

C. believe everything they read on the Internet

D. give out their personal information

2. It's good for children to ______ on the Internet. [ ]

A. give password to others

B. get useful knowledge and information

C. give out a credit card number

D. go into a chat room as they'd like to

3. What shouldn't be done when you are on line? [ ]

A. Using bad language

B. sending massages and e-mails

C. Leaving the site if you are feel unfortable

D. Treaing everyone online as stragers

4. If your parents don't agree, never ______. [ ]

A. Read anything on the Internet

B. relax in your free time

C. have a face-face meeting with anyone you met online

D. treat other people as you'd like to be treated

5. The best title for thispassage is ______. [ ]

A. How to use computer

B. Surfing on the Internet

C. Information on the Internet

D. Internet Safety Rules

化工厂经常使用的阀门种类有（）、（）、球阀、截止阀等。

按照《建设项目环境保护管理条例》的规定，环评文件已通过批准的建设项目的初步设计，应当按照环境保护设计规范的要求，编制环境保护篇章，并依据经批准的建设项目环评文件，在其中( )。

A．落实防治环境污染的措施

B．落实防治生态破坏的措施

C．落实节约能源的措施

D．落实环境保护设施投资预算

E．落实环境保护设施投资概算

修理工艺卡的内容主要包括工序号、工作图和技术要求。

以下属于偏心受压的构件有（）

A、恒荷载为主的多跨多层房屋的内柱

B、屋架受压腹杆

C、多层框架柱

D、单层厂房柱