问题 选择题

本世纪初中国的人口数量(用a表示)、中国的合理人口容量(用b表示)、中国的环境人口容量(用c表示)三者的关系,正确的是 (   )

A.a<b<c

B.c<b<a

C.b<a<c

D.a<c<b

答案

答案:C

明确人口合理容量、人口容量的差异。人口容量是在一定的资源和经济条件下,一地所能容纳的最高人口数(我国的环境人口容量约16亿);人口合理容量是指在有效和持续利用资源、环境等的前提下,一地所能容纳的人口数量(我国的人口合理容量大约8—9亿)。

单项选择题 案例分析题
阅读理解

阅读理解。

      Mama and Daddy loved having the family together on Christmas. They spent days making candy and

cookies, preparing gifts and decorating.

      Forty-four years together made them a great team. But with Mama's unexpected death in the spring,

we now faced our first Christmas without her. The holidays would be especially hard for Daddy. We tried

to comfort him. We would all be with him on Christmas as usual.

      On Christmas Eve a small snow turned to a heavy one, covering our yard and 150-foot driveway, as

well as the access road (干道的支路). We started cleaning, but the snow was falling faster than we could

keep up. The weatherman predicted the storm would continue through the night. Church services were also

canceled. "We'll be there as soon as possible in the morning," I told Daddy on the phone. But inside I wondered

how. 

      Early Christmas morning we began digging through stomach-high snow. We finished the driveway, but

seeing the mountains of snow on the access road, we admitted failure. As I stared at the access road, I heard

the sound of a snowblower. Lord, please help us get to Daddy today, I prayed.

      The sound of the snowblower grew louder. I looked up. There, coming straight toward us was a big

yellow machine with a huge plow (犁) effortlessly clearing a path through the snow-packed road. I stared in

disbelief. Never in our 18 years here had the snow been plowed on this road.

      The driver of the snowblower sat up straight at the wheel and was warmly dressed, collar (衣领) up, cap

down-and wings beneath his coat, I'm sure.

1. We learn from the passage that the author's parents _____. [ ]

A. separated a year ago

B. were married for forty-four years

C. like spending holidays very much

D. have prepared for this Christmas for days

2. The author started to clean the snow in order to _____. [ ]

A. go to church

B. have a clean driveway

C. go to please his father

D. send his children to school

3. Before the snowblower arrived, the author had _____. [ ]

A. decided to give up

B. stopped to have a rest

C. finished the access road

D. cleaned the snow mountains

4. In the author's eyes, the driver of the snowblower was a(n) _____. [ ]

A. angel

B. father

C. ordinary cleaner

D. hard worker