问题 选择题

如图是同学们训练排球时的情景,下列有关说法中正确的是

A.球垫起后,在空中能向上运动,是因为受到惯性的作用

B.球在上升的过程中重力势能转化为动能

C.垫球时,手对球的作用力大于球对手的作用力

D.球下落后越来越快,说明力可以改变物体的运动状态

答案

答案:D

A、球垫起后,在空中能向上运动,是因为球具有惯性,保持原来的运动状态,故A说法错误.

B、球球在上升的过程中动能转化为重力势能,故B说法错误.

C、垫球时,手对球的作用力与球对手的作用力是作用力与反作用力,它们大小相等,故C说法错误.

D、球所受的重力使球下落后越来越快,说明力可以改变物体的运动状态,故D说法正确.

故选D.

填空题
阅读理解

Twenty years ago, I drove a taxi for a living. One night I went to pick up a passenger at 2:30 AM. When I arrived to collect, I found the building was dark except for a single light in a ground floor window.

I walked to the door and knocked, “Just a minute,” answered a weak, elderly voice.

After a long pause, the door opened. A small woman in her eighties stood before me. By her side was a small suitcase.

I took the suitcase to the car, and then returned to help the woman. She took my arm and we walked slowly toward the car.

She kept thanking me for my kindness. “It’s nothing,” I told her. “I just try to treat my passengers the way I would want my mother treated.”

“Oh, you’re such a good man.” She said. When we got into the taxi, she gave me an address, and then asked, “Could you drive through downtown?”

“It’s not the shortest way,” I answered quickly.

“Oh, I’m in no hurry,” she said. “I’m on my way to a hospice(临终医院). I don’t have any family left. The doctor says I don’t have very long.”

I quietly reached over and shut off the meter(计价器).

For the next two hours, we drove through the city. She showed me the building where she had once worked, the neighborhood where she had lived, and the furniture shop that had once been a ballroom where she had gone dancing as a girl.

Sometimes she’d ask me to slow down in front of a particular building and would sit staring into the darkness, saying nothing.

At dawn, she suddenly said,” I’m tired. Let’s go now.”

We drove in silence to the address she had given me.

“How much do I owe you?” she asked.

“Nothing.” I said.

“You have to make a living,” she answered. “Oh, there are other passengers,” I answered.

Almost without thinking, I bent and gave her a hug. She held onto me tightly. Our hug ended with her remark, “You gave an old woman a little moment of joy.”

小题1: The old woman chose to ride through the city in order to ______.

A.show she was familiar with the city

B.see some places for the last time

C.let the driver earn more money

D.reach the destination on time小题2:The taxi driver did not charge the old woman because he ______.

A.wanted to do her a favor

B.shut off the meter by mistake

C.had received her payment in advance

D.was in a hurry to take other passengers小题3:What can we learn from the story?

A.Giving is always a pleasure.

B.People should respect each other.

C.An act of kindness can bring people great joy.

D.People should learn to appreciate others’ concern.