问题 问答题

在探究两电荷间相互作用力的大小与哪些因素有关的实验中,一同学猜想可能与两电荷的间距和带电量有关。他选用带正电的小球A和B,A球放在可移动的绝缘座上,B球用绝缘丝线悬挂于玻璃棒C点,如图所示。实验时,先保持两球电荷量不变,使A球从远处逐渐向B球靠近,观察到两球距离越小,B球悬线的偏角越大;再保持两球距离不变,改变小球所带的电荷量,观察到电荷量越大,B球悬线的偏角越大。

实验表明:两电荷之间的相互作用力,随其距离的________而增大,随其所带电荷量的____________而增大。此同学在探究中应用的科学方法是__________((选填:“累积法”、“等效替代法”、“控制变量法”或“演绎法”)。

答案

参考答案:减小 增大 控制变量法

阅读理解

One fine day, an old couple around the age of 70, walks into a lawyer's office. Apparently, they are there to file a divorce. Lawyer was very puzzled, after having a chat with them, he got their story.

This couple had been quarreling all their 40 years of marriage nothing ever seems to go right.

They hang on because of their children, afraid that it might affect their up-bringing. Now, all their children have already grown up, have their own family, there's nothing else the old couple have to worry about, all they wanted is to lead their own life free from all these years of unhappiness from their marriage, so both agree on a divorce.

While they were signing the papers, the wife told the husband. “I really love you, but I really can't carry on anymore, I'm sorry.”

"It's OK, I understand." said the husband.

Little did she know that, over the years, the husband has been trying all ways to please her, little did she know that drumsticks were the husband's favorite.

Little did he know that she never thought he understands her at all, little did he know that she hates drumsticks even though all he wants is the best for her.

That night, both of them couldn't sleep, toss and turn, toss and turn. After hours, the old man couldn't take it anymore, he knows that he still loves her, and he can't carry on life without her, he wants her back, he wants to tell her, he is sorry, he wants to tell her, "I love you."

He picked up the phone, started dialing her number. Ringing never stops. He never stops dialing.

On the other side, she was sad, she couldn't understand how come after all these years, he still doesn't understand her at all, she loves him a lot, but she just can't take it any more. Phone's ringing, she refuses to answer knowing that it's him. "I want to keep it this way, if not I will lose face. "She thought. Phone is still ringing. She has decided to pull out the cord.

Little did she remember, he had heart problems.

The next day, she received news that he had passed away. She rushed down to his apartment, saw his body, lying on the couch still holding on to the phone. He had a heart attack when he was still trying to get through (接通) her phone line.

小题1:The old couple wanted to file a divorce because __________.

A.they had no child.

B.their children didn’t like them.

C.they didn’t understand each other actually.

D.the old man didn’t love the old woman.小题2:Why didn’t they file a divorce before they were at the age of 70?

A.Because they were loving each other then.

B.Because they had no time to lawyer’s office.

C.Because they wanted to make their divorce open.

D.Because they didn’t wish to affect their children’s up-bringing.小题3:According to the passage we can know that ______.

A.the old man still loved his wife really.

B.the wife didn’t love her husband at all.

C.their children still lived with old couple.

D.they were in harmony over 40 years.小题4:After the last paragraph the old woman would be _______.

A.wild with joy

B.wild with grief(悲伤)

C.unconcern about it

D.angry at that

单项选择题