脑脊液的循环机制是怎样的

阅读理解。

     All students need to have good habits (好习惯). When you have good

study habits, you learn things quickly. You also remember(记住) them easily.

     Do you like to study in the sitting room? This is not a good place because it is usually too noisy (喧闹的) . You need to study in a quiet place,like your bedroom. A quiet place will help you only think about one thing, and you

will learn better.

     Before you begin to study, do not forget to clean your desk. A good desk

light is important,too. You'll feel tired easily if there is not enough light.

1. When you have good habits,do you learn things quickly?

2. Is sitting room a good place for study?

3 .把文中画线的句子翻译成汉语 。

4.Before you study, what should you remember to do?

5.Why do you need to study in a quiet place?

治疗糖尿病可选用的清热药是（）

A.大青叶

B.黄连

C.金银花

D.苦参

E.穿心莲

我国主要大气污染物是（），（），（），（），（）

2012年由湖南经视举办的全国首档大龄电视歌唱比赛《幸福来欢唱》是由哪个公司赞助的？

注册会计师认为抽样结果有95%的可信赖程度，亦即认为抽样结果有5%的可容忍误差。( )