问题 多选题

2008年北京奥运会的成功举办,极大地推动了全民健身运动.小军在校秋季运动会上跳过了1.8m的高度,夺得了男子组跳高冠军,则小军(  )

A.在下降过程中处于失重状态

B.离地后的上升过程中处于超重状态

C.起跳过程中,地面对他的平均支持力大于他的重力

D.起跳过程中,地面对他的平均支持力小于他的重力

答案

A、在下降过程,只受重力的作用,有向下的重力加速度,是处于完全失重状态,所以A正确.

B、起跳以后在上升过程,也是只受重力的作用,有向下的重力加速度,是处于完全失重状态,所以B错误.

C、在起跳时,地面要给人一个向上的支持力,支持力的大小大于人的重力的大小,人才能够有向上的加速度,向上运动,所以C正确,D错误.

故选AC.

问答题
阅读理解

A son and his father were walking on the mountains. Suddenly, his son falls, hurts himself and screams: “AAAhhhhhhhhhh!!!” To his surprise, he hears the voice repeating, somewhere in the mountains: “AAAhhhhhhhhhh!!!”

Curious, he shouts: : “Who are you?” He receives the answer:” “Who are you?” And then he screams to the mountain: “I admire you!” The voice answers: “I admire you!”

Angered at the response, he screams: “Coward (one without courage)!” He receives the answer: “Coward!”

He looks to his father and asks: “What's going on?” The father smiles and says: “My son, pay attention.”

Again the man screams at the top of his voice: “You are a champion!” The voice answers: “You are a champion!”

The boy is surprised, but does not understand. Then the father explains: “People call this ECHO (回音) , but really this is LIFE. It gives you back everything you say or do. Our life is simply a reflection of our actions. If you want more love in the world, create more love in your heart. If you want more competence in your team, improve your competence.”

This relationship applies to (适用于) everything, in all aspects of life; life will give you back everything you have given to it.”

小题1:The boy is surprised because __________.

A.he falls over his own feet.

B.his father can shout as loud as he does.

C.he hears his screams repeated.

D.someone calls him a coward.小题2:What’s the father’s attitude towards life?

A.hopeful

B.disappointed

C.upset

D.hopeless小题3:Which of the following sayings is in keeping with the father’s teachings?

A.Faith will move mountains.

B.A great talker is a great liar (说谎者).

C.Love me, love my dog.

D.Do well and have well.