图示结构，作用荷载P，不计轴向变形时，支座A的反力矩MA等于________

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 in a good way. Here are some rules 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 online, for how long and what activities you can go online.
Don’t give your password (密码) to anyone else, and never leak out the following information---your real name, home address, age, school, phone number or other personal information.
Check with your parents before giving out a credit (信用) card number.
Never send a photo of yourself to someone 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 must make sure it’s a right place for you.
Never agree to meet someone you met on the Internet without your parent’s permission (允许). 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.
6. If you want a true friend on the Internet , you can ____________ .
A tell the people what your name is.
B meet the people on line alone.
C write an e-mail about yourself.
D get your parent’s permission.
7. 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
8. The underlined phrase “leak out” in the third paragraph may mean “________.”
A. give away　B. leave out C. give out D. put away
9. If your parents don’t agree, never ________.
A. read anything on the Internet B. relax in your free time
C. have a face-to face meeting with anyone you met online
D. treat other people as you’d like to be treated
10. This passage is mainly about “________”.
A. How to use Computers B. Surfing on the Internet
C. Information on the Internet D. Internet Safety Rules

以下关于人口的描述正确的是（）。
A.人口就是指劳动适龄人口
B.人口指有劳动能力的人为的主体
C.在我国，人口是指年满16周岁的一切有劳动能力和无劳动能力的人
D.人口是全部社会行

根据消费税法律制度的规定，下列消费品中，实行从量定额与从价定率相结合的复合计征办法征收消费税的有（）。
A.卷烟
B.成品油
C.白酒
D.小汽车

在财务会计机构内部按照会计工作的内容和会计人员的配备情况进行合理的分工，就是()。
A.会计机构的设置
B.会计工作岗位的设置
C.会计工作的组织方式
D.内部会计管理制度