问题 选择题

在生物分类的等级单位中,最高和最低的分类单位分别是(  )

A.门和种

B.界和科

C.纲和种

D.界和种

答案

生物分类单位由大到小是界、门、纲、目、科、属、种.分类单位越大,生物的亲缘关系越远,生物的共同特征就越少,包含的生物种类就越多;分类单位越小,生物的亲缘关系越近,共同特征就越多,包含的生物种类就越少.界是最大的分类单位,最基本的分类单位是种,同种的生物亲缘关系最近.

故选:D

阅读理解

阅读理解。

     You have stopped to buy food on your drive across Canada. You pick up a can of peas.

On one side, the label(标签) says "peas" . On the other, it says "petit pois". By law food labels

and many other printed notices in Canada must be in two languages---English and French.

     The reason is simple: many Canadians speak English but not French. Others speak French

but not English. By requiring that label be printed in both languages, Canada is trying to ease

the problems of living in a bilingual society.

     English is the dominant (important) language in most of Canada. In all provinces but Quebec,

most of the people speak English. Quebec was the center of French settlement in colonial

(殖民地的) times, and most of its people are descendants (后裔) of French settlers. Today

nearly two out of three people in Quebec speak only French. Communities of French-speaking

people also live in other provinces, especially in the Maritime Provinces.

     French Canadians are bound (约束) together not only by language but also by religion. Like

their French ancestors (祖先), most are Roman Catholics. Most English-speaking Canadians are

Protestants.

1. Why does the food label must be printed in two languages in Canada? 

A. Because the Canadians know both English and French.

B. Because the Canadians know either English or French.

C. Because many Canadians like French besides English.

D. In order to make the English and the French understand it easily

2. What's the meaning of the underlined word "bilingual" in the second paragraph ?

A. developed.    

B. rich.    

C. two languages.    

D. poor.

3. Which statement is correct according to the passage? 

A. Today all the people in Quebec don't only speak French.

B. People in all the provinces in Canada speak English besides Quebec.

C. Most English-speaking Canadians are Catholics.

D. French Canadians are bound together not by language but by religion.

4. This passage mainly tells us ___________. 

A. food labels in Canada must be in two languages

B. Quebec is the only province where French is spoken

C. Canada is a bilingual nation

D. English is the dominant language in most of Canada

单项选择题