问题 单项选择题

11月22 ,某地理研究性学习小组在观测房屋采光状况时,发现甲楼阴影恰好遮住乙楼三层中部(如下图所示),在甲楼顶层GPS测得纬度为31.8366°、经度为117.2179°、高程为96m。完成下列问题。

隔25小时再次观测时,甲楼阴影可以遮挡乙楼()。

A.二层西部

B.四层东部

C.五层西部

D.七层东部

答案

参考答案:B

解析:

据题意可知,甲楼阴影正好在乙楼的中部,说明此时为正午,即11月22日12时。又甲楼冬至日时在乙楼上的投影朝向北方,可知该地位于北半球。25小时后,该地时间为11月23日13时,此时太阳已经开始向西下落,太阳高度降低,那么甲楼在乙楼的投影则应向东移动,且阴影当更长。所以本题选B。

阅读理解

阅读理解。

     This year some twenty-three hundred teenagers (young people aged from 13-19) from all over the world

will spend about ten months in U.S. homes. They will attend U.S. schools, meet U.S. teenagers, and form

impressions of the real America. At the same time, about thirteen hundred American teenagers will go to other

countries to learn new languages and gain a new understanding of the rest of the world.

     Here is a two-way student exchange in action. Fred nineteen, spent last year in Germany with George's

family. In turn, George's son Mike spent a year in Fred's home in America.

     Fred, a lively young man, knew little German when he arrived, but after two months' study, the language

began to come to him. The school was completely different from what he had expected-much harder.

Students rose respectfully when the teacher entered the room. They took fourteen subjects instead of the six

that are usual in the United States. There were almost no outside activities.

     Family life, too, was different. The father's word was law, and all activities were around the family rather

than the individual. Fred found the food too simple at first. Also, he missed having a car.

     "Back home, you pick up some friends in a car and go out and have a good time. In Germany, you walk,

but you soon learn to like it."

     At the same time, in America, Mike, a friendly German boy, was also forming his idea. "I suppose I should

criticize American schools," he says. "It is far too easy by our level. But I have to say that I like it very much.

In Germany we do nothing but study. Here we take part in many outside activities. I think that maybe your

schools are better in training for citizens. There ought to be some middle ground between the two."

1. The whole exchange programme is mainly to ____.

A. help teenagers in other countries know the real America

B. send students in America to travel in Germany

C. let students learn something about other countries

D. have teenagers learn new languages

2. Fred and Mike agreed that ____.

A. American food tasted better than German food

B. German schools were harder than American schools

C. Americans and Germans were both friendly

D. there were more cars on the streets in America

3. What is particular in America schools is that ____.

A. there is some middle ground between the two teaching buildings

B. there are a lot of outside activities

C. students usually take fourteen subjects in all

D. students go outside to enjoy themselves in a car

4. After experiencing the American school life, Mike thought ____.

A. a better education should include something good from both American and Germany

B. German schools trained students to be better citizens

C. American schools were not as good as German schools

D. the easy life in the American school was more helpful to students

单项选择题