包扎的作用除外（）。 A.防止休克 B.保护创面 C.压迫止血 D.固定辅料和夹板

下列有关化学基本概念的判断依据正确的是（　　）

A．共价化合物：是否含有共价键

B．氧化还原反应：元素化合价是否变化

C．强弱电解质：溶液的导电能力大小

D．离子晶体：液态时能否导电

照样子组词写句子。

例：互　互相　我们要互相学习。

扬　_____　___________________________________

洋　_____　___________________________________

根据短文内容及首字母提示，填写所缺单词，将答案按序号填入下面表格内。

Reading books is a good hobby for all kinds of reasons.

First, reading books is f小题1:. You can always keep yourself interested and help you to have an enjoyable time if you like reading. This is especially u小题2:  when the weather is bad. It is a relaxing hobby too. You can really become lost in a book.

Next, you can read a book a小题3: : in a car, in a waiting-room, on a plane, in bed —even in the bath. All you n 小题4: is a book! Reading is a convenient hobby as it is easy to stop and then start again.

A 小题5: good reason for reading books is that it is useful. If you read as a hobby you will get better and better at it. This m 小题6:  that you will read faster and will become better at understanding what you read. As your reading improves, you will probably find your schoolwork becomes much e 小题7:. Many school subjects depend on（依靠） good reading and, as you read, you learn more and more.

Some people say that reading is out of date（过时）. This is not t小题8: . You have to be able to read to use a computer and, the better you read, the better your computer skills will be. Reading is never out of date!

Good readers are most likely to be good w 小题9: , too. They are usually good at spelling as well, and have more things to write about. Reading books is a wonderful hobby, one of the best. W 小题10:  other hobby could be more useful, or more enjoyable?

阅读下面的三则材料，写出你探究的结果。

　　材料一两千多年前，黄河只叫“河”没有“黄”。《诗经》中许多篇章都提到过。那时的黄河水还比较清亮。黄河上游及晋陕一带森林植被还比较多，水草丰茂，清澈秀丽。

　　材料二古人言“黄河清，天下宁”，黄河的治理，事关广大人民的生计。

　　材料三

（1）_________________________________________

（2）_________________________________________

（3）_________________________________________

民用建筑的门、窗嵌缝，宜选用( )。

A．沥青嵌缝油膏
B．丙烯酸类密封膏
C．塑料油膏
D．F类硅酮密封膏