问题 不定项选择题

进行化学实验,观测实验现象,通过分析推理得出正确的结论是化学学习的方法之一。下列对有关实验事实的解释正确的是[ ]

A.SO2气体通入溴水(橙红色)褪色,表现了SO2的漂白性;足量的二氧化硫通入紫色石蕊试液中先变红后褪色,因为生成酸使其变红,又因为SO2的漂白性,使其褪色

B.浓硝酸在光照条件下变黄,说明浓硝酸易分解生成有色产物且溶于浓硝酸

C.常温下,将铝片放入浓硫酸中,无明显现象,说明铝不与冷的浓硫酸反应

D.向CuSO4溶液中加入一小块金属钠,则钠与Cu2+反应可置换出铜

答案

答案:B

阅读理解

阅读短文,选择正确答案。

      Welcome to China, we'll invite you to eat the real Chinese food-dumplings. In China, there are many

different kinds of food. Some of them are very popular. The real Chinese food is dumplings. Now let's talk

about them, OK?

      Everyone in China likes dumplings very much, and there are many different kinds of dumplings. Some have

meat and vegetables in them; others have sugar, eggs and so on. I like dumplings with vegetables and pork better

than any other kind.

      Usually people make dumplings at home. If you have no time to make them, you can buy them from any

supermarket. Then you take them home and eat them with vinegar. The Spring Festival is very important in

China. When it comes, we make dumplings; usually we put a coin in a dumpling. If one eats the dumpling with

the coin in it, he or she will be lucky in the year.

      In the old days, people couldn't often eat dumplings because they were very poor. Now our country is

becoming stronger and stronger, and our people are richer and richer. We can eat them very often.

      Now tell me, do you like dumplings? What kind of dumplings do you like?

      And to our surprise, many foreigners have problems making dumplings, so they go to Chinese restaurants

to eat dumplings, not make at home. They also like eating dumplings.

1. In China, the real Chinese food is ________. [ ]

A. noodles

B. moon cakes

C. vegetables

D. dumplings

2. The author (作者) likes dumplings with _______ best. [ ]

A. meat

B. seafood

C. vegetables and pork

D. vegetables

3. If you want to eat dumplings, you can do all the following things except ________. [ ]

A. make dumplings at home

B. go to visit the foreigners

C. buy dumplings from any supermarket.

D. go to a restaurant

4. Which of the sentences is NOT true? ________ [ ]

A. In the old days, people often eat dumplings because they are poor.

B. If one eats the dumpling with the coin in it, he will be lucky in the year.

C. The Chinese like dumplings very much.

D. Now people are richer and richer and they can eat dumplings at any time if they like.

单项选择题