父母对子女的抚养义务是[] A．法律规定的，也是道德的要求 B．随着父母离婚而免

颞下颌关节脱位的病因包括（）。

A.过度张口

B.暴力打击

C.年老体衰

D.久病体虚

E.持续劳损

国家对部分纺织品出口实行临时出口许可证管理，商务部是负责全国纺织品出口临时管理工作，根据工作需要会同海关总署和质检总局制定及调整纺织品出口临时管理目录。

How to protect children Web fans from unsuitable material on-line while encouraging them to use the Internet has long been discussed in the US.

For some parents, the Internet can seem like a jungle, filled with danger for their children. But jungles contain wonders as well as dangers and with good guides, some education, and a few precautions, the wilds of the Internet can be safely navigated. "Kids have to be on-line. If we tell our kids they can’t have access to the Internet, we’re cutting them off from their future, " said an expert.

Most kids have started to use search engines. Many of them are great for finding tons of interesting Internet sites, and they can also locate places where you might not want your kids to go. There are search engines designed just for kids. A certain software contains only sites that have been selected as safe. The most popular way to limit access would be to use what is known as a "content screener". But this can’t be wholly reliable, and the best thing parents can do is to talk to their kids and let them know what is OK or not OK to see or do on the Internet. Another way is that mum or dad is nearby when the child is surfing the Internet.

A few other tips

·Don’t put the PC in a child’s room but keep it in an area where mum or dad can keep an eye on things. That also makes the Internet more of a family activity.

·Ask your child what he or she has been doing and about any friends they make on-line.

·Tell your child not to give on-line strangers personal information, especially like address and phone number.

·And tell your children never to talk to anyone they meet on-line over the phone, send them anything, accept anything from them or agree to meet with them unless you go along.

The best way to protect children from improper material is（）

A. to install (安装) a content screener on the computer

B. to buy some search engines for the children

C. to be nearby when they are surfing the Internet

D. to talk to the children and persuade them to tell right from wrong

下列属于固态热源的是（）。

A.液化石油气

B.煤气

C.柴油

D.煤

瘀血阻滞者可见

A．头晕面白，腰膝冷痛
B．头晕面白，神疲体倦
C．头晕刺痛，痛有定处
D．头晕且重，如物裹缠