问题 单项选择题

雨滴从静止开始下落,遇到水平方向吹来的风f不计空气阻力),下列说法正确的是

A.若风速越大,雨滴下落的时问将越长

B.若风速越大,雨滴下落的时间将越短

C.若风速越大,雨滴着地时速度将越大

D.若风速越大,雨滴着地时速度将越小

答案

参考答案:C

解析:解析∶雨滴下落的速度不变,到地面的距离不变,所以下落时间不会改变;雨滴下落速度是竖直向下的速度和水平风速的和速度,所以风速越大,雨滴落地时的速度越大。

阅读理解

My grandfather came from Hungary and was the only one in his family who settled down in the United States. The rest of his family remained in Europe. When World War I broke out, he seemed to have become another man, downhearted. Such obvious change was not born out of concern for his welfare, but out of fear: if his only son, my uncle, had to go to war, it would be cousin fighting against cousin.

One day in 1918, my Uncle Milton received his draft notice. My grandparents were very upset. But my mother, at the age of 10, felt on top of the world about her soldier brother going off to war. Realizing how he was regarded by his little sister and all of her friends, my uncle bought them all service pins, which meant that they had a loved one in the service. All the little girls were delighted.

The moment came when my uncle and the other soldiers, without any training but all in uniforms, boarded the train. The band played and the crowd cheered. Although no one noticed. I’m sure my grandmother had a tear in her eye for the only son. The train slowly pulled out, but not about a thousand yards when it suddenly paused. Everyone stared in wonder as the train slowly returned to the station. There was a dead silence before the doors opened and the men started to step out. Someone shouted, “The war is over!” For a moment, nobody moved, but then the people heard someone bark orders at the soldiers. The men lined up in two lines, walked down the steps, and with the band playing, marched down the street, as returning heroes, to be welcomed home. My mother said it was a great day, but she was just a little disappointed that it didn’t last a tiny bit longer.

小题1:What the grandfather was most worried about was ______.

A.the spread of the world war

B.the safety of his two cousins

C.a drop in his living standards

D.his relatives killing each other小题2:The underlined phrase “draft notice” means “______”.

A.order for army service

B.train ticket for Europe

C.letter of rejection

D.note of warning小题3:What did the “service pins”(in Para. 2) stand for in the eyes of the little girls?

A.Strength.

B.Courage.

C.Victory.

D.Honor.小题4:Which of the following words can best describe the ending of the story?

A.Disappointing.

B.Unexpected.

C.Uncertain.

D.Inspiring.

单项选择题