问题 填空题

(3分)“可燃冰”是天然气与水相互作用形成的晶体物质,主要存在于冻土层和海底大陆架中。据测定每0.1m3固体“可燃冰”要释放20m3的甲烷气体,“可燃冰”将成为人类的后续能源。“可燃冰”(用甲烷表示)燃烧的化学反应方程式为:                                 ,若把该反应在一定条件下改装成原电池,则在原电池的负极发生反应的物质是:        

答案

CH4+ 2O2 → CO2+2 H2O,CH4(写名称也可)

阅读理解

阅读理解。

         Chinatown is the name given to an area in the middle of London. It is just between Leicester Square

and Shaftsbury Avenue. Gerrard Street is at the center and is the most important street in the area. There

is a large Chinese community (社区) with a lot of Chinese restaurants, Chinese supermarkets and shops in

this street.

         In the 1950s, it was a poor area and everything was very cheap. At the same time, the world rice

market changed and thousands of farm workers in Hong Kong lost their jobs. They began arriving in London

to look for work. They found jobs in the restaurants in this area. Many British people liked Chinese food, and

the restaurants were popular.

         These restaurant workers often worked 17 hours a day and had no time to learn English. As more

Chinese arrived, more shops and businesses grew up. Wives came and joined their husbands and children

came and joined their fathers. The community grew, and Chinatown was born.

         In the 1970s and 1980s, British-born Chinese started to have a better education and this brought

economic (经济的) success to the area. Many families moved out of Chinatown, and there was more space

for businesses. Gerrand Street became a street only for visitors and was soon a popular place for tourists.

        Now everyone knows about London's Chinatown. During the Chinese New Year, the streets are seen

with flags and thousands of Chinese go into the streets. For most of the year, though, Londoners and tourists

go there mainly for the food in the Chinese restaurants. The best restaurants are the ones where the Chinese

eat.

1. Is this Chinatown in the middle of London?

   ________________________________________________

2. Was the area rich or poor in the 1950s?

   ________________________________________________

3. Why did the restaurant workers have no time to learn English?

   ________________________________________________

4. When did British-born Chinese start to have a better education?

   ________________________________________________

5. What are the main points about Chinatown in this passage?

   ________________________________________________

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