问题 选择题

用如图所示的简易净水器处理河水,下列对该净水器净化过程的分析中正确的是(  )

A.此净水器能杀菌消毒

B.该净水器能软化硬水

C.通过该净水器净化后的水是纯净水

D.净水器中的活性炭主要用来除去有色和异味的物质

答案

A、该净水器不能起到杀菌的作用,故A错误;

B、硬水软化是减少水中的可溶性钙镁化合物,该装置不能减少可溶性钙镁化合物,不能达到硬水软化的目的,故B错误;

C、纯净水是不含有其他杂质的水,通过该净水器不能除去水中的可溶性杂质,得不到纯净水,故C错误;

D、活性炭具有吸附性,能吸附色素和异味,故D正确;

故选D.

单项选择题
阅读理解

(D)

People living in the country enjoy several advantages that people living in the city cannot enjoy.

They are in close contact with nature. They make friends with trees and stones. They breathe fresh air. They fight with strong winds. They listen to the song of birds.

This contact with nature is good for health. There are many diseases that are common in the city, but are not to be found in the country, For example, near-sightedness is almost unknown to country people.

Because of the absence of cars, one can walk more freely in the country than in the city, There are no rules of the road nor traffic signs to obey.

People living in the country can easily get fresh vegetables, fresh fruit and fresh milk, Are they get them at lower prices than in the city.

Country life is economical in other ways, too. There are practically no temptations to waste money.

Country people are mostly honest. They say what they mean, and make and keep promises with sincerity. They do not put on air (摆架子). They do not pretend to have those ridiculous manners which are necessary in what we call polite society.

67. What CAN’T country people often enjoy?

A. Musical concerts.          B. Fresh air.   

C. Song of birds.             D. Close contact with nature.

68. What is probably more expensive in the country than in the city?

A. Vegetables.          B. Beer.          C. Milk.           D. Fruit.

69. What is NOT true of country life?

A. The traffic accident rate is very high in the country.

B. Living in the country saves one a lot of money.

C. Country people enjoy better health than the city people.

D. Country people are honest.

70. Which of the following statements is true according to the passage?

A. People living in the country enjoy no advantages.

B. People living in the city are in close contact with nature.

C. People living in the country suffer from more diseases than those living in

the city.

D. The prices of farm products are lower in the country than in the city.

71. Which of the following would be the best title for the passage?

A. The Disadvantages of Living in the Country.

B. The Expenses of Living in the Country.

C. Country Life.

D. Healthy Country People.