若所有的其他因素都相同，下列几种波形中声速最大的是（）。A、切变波 B、横波 C、表

阅读理解。

     Many students feel it is difficult to remember new words when they begin to study English. Now I will

give you some advice.

     Do not waste time in learning the word list. It is not a good way to remember new words. The best way to learn new words is through listening. You can find radio programmes or TV programmes. And listen to

them carefully. When you listen to the conversations, you will learn the pronunciation easily. Of course, it is not enough; you have to remember their spellings.

     Some people find that they can learn the names of everyday objects such as box, bottle, cup, desk and so on, in the following way. They write the names of things on paper, and then they read the words on the paper. Try this and see if this way works for you. If it does not work, then go on to practise listening to the conversations.

根据短文内容，判断正（T）误（F）。

( )1. To remember new words is not easy for many students.

( )2. Learning the word list is a good way to remember new words.

( )3. The best way to learn new words is to listen to radio and TV programmes.

( )4. Listening to radio and TV is enough.

( )5. If you write the names of things on paper, it will help you learn new words.

“丹东是我家，文明靠大家!”作为中学生，我们应积极参与创建文明城市的建设 ，尽我们所能去做点事情。请根据以下提示写一篇短文（开头已给出，不计入总词数）

提示： 1. 不得透露考生真实姓名、地点、学校名称

2. 这些词汇或许对你有帮助：respect(尊敬)，be polite to,traffic rules,in trouble,

protect(保护),the zebra crossing(斑马线)，step on the grass,red light,litter.......

3. 语句通顺，意思连贯，可适当发挥。

Dandong is now making its effort to become a civilized( 文明的) city .As a student

住房置业担保公司应当建立()，用于担保公司清算时对其所担保债务的清偿。

A.保证金制度

B.置业担保基金

C.风险基金制度

D.风险准备金

材料中的“国内生产总值"JE确的表述是(　　)。

A．一国居民在一定时期内生产的全部最终产品和劳务的市场价格总额

B．一国居民在一定时期内生产的最终产品和劳务的市场价格总额

C．一国在一定时期内所生产的全部产品和劳务的市场价格总额

D．一国在一定时期内，在其领土范围内，本国和外国居民生产的最终产品和劳务的价格总额

青春期女性发育特点是

A．月经初潮时卵巢已完全成熟

B．在初潮1～3年内多为无排卵月经

C．腋毛发育在 * * 发育之前

D．月经初潮时，以体重增加为主

E．月经初潮前生长发育缓慢