更换传动皮带时，为什么采取先缩短轴距，后换皮带，然后调整轴距的顺序？

根据首字母，填出正确的单词。

1. Don't s _____ in class. Keep awake, please.

2. A g ______ has a very long neck. It's a beautiful animal.

3. A dolphin is very i ________ because it can act as people do.

4. It has an u _____ face. We are afraid of it.

5. The panda is very shy, so please be very q ________.

膜性肾小球肾炎的主要临床表现是（）。

A.肾病综合征

B.急性肾炎综合征

C.慢性肾炎综合征

D.无症状血尿、蛋白尿

E.快速进行性肾炎综合征

下列说法中不正确的为( )。

A．生产过程中散发的可燃气体、蒸汽、粉尘的作用能引起自燃、爆炸的厂房，应采用不循环使用的热风采暖

B．与采暖管道、散热器表面接触能引起燃烧的厂房，应采用不循环使用的热风采暖

C．生产过程中散发的粉尘受到水、水蒸气的作用能引起自燃、爆炸的厂房，应采用不循环使用的热风采暖

D．受到水、水蒸气的作用能产生爆炸性气体的厂房，应采用循环使用的热风采暖

B

The worst danger is a house on fire when people are asleep. Always be ready to leave through a window into the garden by making sure you can open it if necessary. If you should be on holiday in a tall building or hotel, make sure you know where the fire escape(太平梯) is. When you can’t find any way out, try to find pieces of cloth and make a rope to get out of a window to safety. If you smell burning in your home, get out right away. If you can’t breathe properly because of smoke on your way out, crawl(爬) on your hands and knees because smoke rises and the air will be cleaner near the floor. Smoke is a killer and more people die from breathing it in than actually being burned.

Fire in a cinema hall or public place often means people pushing to reach a door. Keep your head up with arms up in front of your chest. This protects your chest and gives you the best chance to breathe. Above all, don’t get frightened!

60. When a tall building is on fire, people______.

A.can leave by coming down the fire escape     B.should first check the room window

C.had better find a long rope                 D.must lie down on the floor at once

61. People can leave a burning house through a window if ______.

A.there is smoke in the room          B.  there is no other way out

C .they can’t breathe properly          D.  they want to put out the fire

62. There are several things to do to keep one safe. Which of the following is not talked about in the passage?

A.Leave the house right away when you smell something burning.

B.Raise your head and keep your chest from being hurt.

C.Get out of the house by crawling on the floor.

D.Rush out of the house, dressed in wet clothes.

63. Which of the following is not true?

A.In a fire, more deaths are caused by smoke.

B.The most important thing is not to be frightened in a fire.

C.When a public place is on fire, people usually push to leave.

D.Be ready to leave a burning house through a window if there is a garden down below.

夏季面色微赤，入秋则面色渐白，称为（）

A.主色

B.客色

C.常色

D.病色

E.恶色