单选题 Thirty-two people watched kitty Genovese being killed right beneath their windows. She was their neigh bor. Yet none of the 32 helped her. Not one even called the police. Was this in gunman cruelty? Was it lack of feeling about one's fellow man?
"Not so," say scientists John Barley and Bib Fatane. These men went beyond the headlines to probe the reasons why people didn't act. They found that a person has to go through two steps before he can help. First he has to notice that is an emergency.
Suppose you see a middle-aged man fall to the side waik. Is he having a heart attack? Is he in a coma (昏迷) from diabetes(糖尿病)? Or is he about to sleep off a drunk?
Is the smoke coming into the room from a leak in the air conditioning? Is it "steam pipes"? Or is it really smoke from a fire? It's not always easy to tell if you are faced with a real emergency.
Second, and more important, the person faced with an emergency must feel personally responsible. He must feel that he must help, or the person won't get the help he needs.
The researchers found that a lot depends on how many people are around. They had college students in to be "tested". Some came alone. Some came with one or two others. And some came in large groups. The receptionist started them off on the "tests". Then she went into the next room. A curtain divided the "testing room" and the room into which she went. Soon the students heard a scream, the noise of file cabinets falling and a cry for help. All of this had been pre-recorded on a tape-recorder.
Eight out of ten of the students taking the test alone acted to help. Of the students in pairs, only two out of ten helped. Of the students in groups, none helped.
In other words, in a group, Americans often fail to act. They feel that others will act. They, themselves, needn't. They do not feel any direct responsibility.
Are people bothered by situations where people are in trouble? Yes. scientists found that the people were emotional, they sweated, they had trembling hands. They felt the other person's trouble. But they did not act. They were m a group. Their actions were shaped by the actions of those they were with.

单选题 The purpose of this passage is______.
【正确答案】 B
【答案解析】[点拨] 本文意思在于解释人们在紧急状态的行为,故选B。
单选题 Which of the following is NOT true?
【正确答案】 C
【答案解析】[点拨] 第三至五段讲到了这几点,C所说的一个人如果要帮助别人,就得对此人的安全负全责显然是不符合逻辑的,故选C。
单选题 The researchers have conducted an experiment to prove that people will act in emergencies when______.
【正确答案】 C
【答案解析】[点拨] 文中提到的试验证明,当人独自一人时,最可能帮助处于紧急状况下的他人,选C。
单选题 The main reason why people fail to act when they stay together is that______
【正确答案】 D
【答案解析】[点拨] 原因在于他们都觉得其他人会伸出援手,自己因此没有直接的责任,所有不采取行动,故选D。
单选题 The author suggests that______.
【正确答案】 A
【答案解析】[点拨] 本文研究的是人在处于紧急状况下的行为模式和动机,通读全文可确定应选A。