问题 填空题

(8分)写出有关反应方程式

(1) 由苯制溴苯_______________________________

(2) 由乙炔制聚氯乙烯_______________________________________

(3) 杯状化合物A可作为金属离子配合物的配体,其结构如图:选用均不超过10个碳原子的两种有机物为原料,经缩合生成A。_________________________________。

答案

(1)

(2)+HClCH2=CHCl

n CH2=CHCl

(3)

考查有机反应方程式的书写。

(1)苯和液溴在催化剂的作用下发生取代反应生成溴苯

(2)聚氯乙烯的单体是氯乙烯,乙炔和氯化氢发生加成反应,即得到氯乙烯。

(3)根据有机物的结构简式可判断,该反应类似于酚醛树脂的制取,因此需要的原料是甲醛和

阅读理解

阅读理解。

    

     Many earthquakes (地震) happen without warning, so it is important to know what to do wherever you

are during an earthquake. Here are some top tips on how to stay safe in an earthquake. 

    ◆ Keep a cool head. Worry may make bad decisions. Think about what you should do. The first several

seconds are important. 

    ◆ If you are indoors during an earthquake, hide under a heavy desk and protect your head. Stay away from

windows and anything that could fall on you.

    ◆ If you are in a crowded hall away from the door, don't rush to the exit. You will find too many people

trying to get out at the same time. Instead, hide under a desk or a table. Do not get into a lift during an

earthquake!

    ◆Stay in a safe area until you are sure it's OK to leave. Some aftershocks (余震) may follow an earthquake.

These are as dangerous as the earthquake. 

    ◆If you are at home and you smell gas, open a window and leave the building quickly.

    ◆ If you are outdoors, find a clear place away from buildings, trees, street lights and power lines.

    ◆If you are buried in debris (埋在废墟), you may make noises by knocking at the rocks. Shouting will use

up your energy. You could be without help for up to 72 hours. Try to find some water and food. These are

important for you.

1. The underlined words "top tips" mean _________.

A. useful advice

B. boring news

C. interesting stories

2. If you are in a crowded hall away from the door when an earthquake happens,

    you mustn't try to get out because _________.

A. it's more dangerous outside

B. you may lose the way

C. people may hurt each other when rushing out at the same time

3. Which one is right during an earthquake?

A. If you smell gas, stay at home and wait for help.

B. Hiding under a heavy desk if you are indoors.

C. Using the lift to go downstairs.

4. You should _________ if yo u are buried in debris.

A. find a clear place

B. keep shouting for help

C. catch people's attention by knocking at the rocks

5. From the passage we know that _________.

 A. keeping a cool head is very important during an earthquake

B. we can hide under the tree during an earthquake

C. we needn't care about aftershocks

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