问题 单项选择题 A1/A2型题

对缓冲溶液的定义理解不正确的是()。

A.要使缓冲液有缓冲作用,缓冲溶液必须同时含有足量的能够对抗外来强酸的组分

B.具有缓冲作用的溶液称为缓冲溶液

C.能够对抗外来的大量强酸以及强碱

D.其起到的作用称为缓冲作用,换言之为不易引起溶液pH改变的作用

E.缓冲溶液虽然能够对抗外来强酸强碱,但是少量的

答案

参考答案:C

解析:能够对抗外来少量强酸或少量强碱而不易引起溶液pH改变的作用称为缓冲作用,具有这种缓冲作用的溶液称为缓冲溶液。

阅读理解

People from other contries will find many different suprising things in Britain.

Greek: A man from Greece sees a special way of driving in Britain. People drive on the left in the British street, but the British people never feel surprised. The Greek man said,“I’ve been in Britain for nearly a month now. But at first, I couldn’t always remember to drive on the left. Every time,my friend reminded me.”

Japanese:Japanese people can’t ucderstand why British people keep their shoes on at home. In Japan,people walk in the room without shoes. If visitor keeps his shoes on at home in Japan, the Japanese people think he is very impolite.

Spanish:The Spanish people mind the way that the British people greet each other. They themselves seem to be afraid of touching(接触).When they meet,they just smile or nod but never kiss or hug(拥抱) in Spain. But the British people think kissing is a very usual greeting when they meet!

There is an old saying,“When in Rome,do as Romans do.”When we go to a foreign country, we should follow the etiquette of country.

小题1:The Greek visitor________.

A.always drives on the left

B.used to drive on the left

C.drove correctly in Britain with his friend’s help

小题2:______think it’s impolite to wear shoes at home.

A.The Japanese          B.The Greek          C.The English

小题3:When greeting,the Spanish _______.

A.kiss each other        B.hug each other       C.smile at each other

小题4:_____seem not to be afraid of touching each other.

A.The Spanish           B.The British          C.The Japanese

小题5:Etiquette in the world______.

A.is the same           B.is important        C.is sometimes different and interesting

单项选择题 B1型题