问题 选择题

元素的性质与原子结构及周期表中的位置有着密切的关系。下列说法正确的是

A.13C与14C互为同位素,化学性质相同,但相对原子质量一定不同

B.某元素原子次外层电子数是最外层电子数的2倍,则该元素氧化物为酸性氧化物

C.IA族元素与VIIA元素形成的化合物都为离子化合物

D.短周期中,同周期元素的离子半径从左到右逐渐减少

答案

答案:A

正确答案:A

B.不正确,某元素原子次外层电子数是最外层电子数的2倍,则该元素氧化物CO2为酸性氧化物,CO为不成盐氧化物。

C.不正确,IA族元素与VIIA元素形成的化合有离子化合物,如NaCl,有共价化合物,如HCl

D.不正确,短周期中,同周期元素的离子半径,当电子层结构相同时,从左到右逐渐减少。

阅读理解

All around the world, people drink tea. But tea doesn’t mean the same thing to everyone. In different countries people have different ideas about drinking tea.

People in China like to drink tea with nothing in it, and they often have it with their friends or by themselves. They have two kinds of tea—green tea and black tea. They may drink tea at any time of the day anywhere. But they don’t drink tea just before they go to bed, for tea makes them awake.

In England, people like to drink tea with milk and sugar in it, and they often have it in the afternoon with their friends.

In Japan, people also like drinking tea very much. It is very popular there. They drink tea every day. They have it in different ways from that in China. Some young Japanese girls are good at making tea. They can do it beautifully.

In the U.S.A., people drink tea at breakfast or after meals. They usually use tea bags to make their tea. Making tea with tea bags is faster and easier than making it with tea leaves in teapots.

小题1:People in ________ like to drink tea with milk and sugar in it.

A. England      B. China        C. the U.S.A.      D. Japan

小题2:Why don’t people often drink tea before they go to bed in China?

A.Because they are full.

B.Because they may not sleep well.

C.Because there is nothing in the tea.

D.Because there is some milk and sugar in it.小题3:In which country do people usually make tea with tea bags?

A. In England.  B. In China.    C. In the U.S.A.    D. In Japan.

小题4:Chinese people like to drink ________.

A.tea with anything in it

B.milk and sugar in it

C.tea with tea bags in it

D.tea with nothing in it小题5:What does “black tea” mean in Chinese? It means ________.

A.浓茶

B.黑茶

C.红茶

D.绿茶

问答题