问题 选择题

下列现象或做法中不能说明声波可以传递能量的是

A.蝙蝠靠超声波捕食

B.利用超声波消除肾结石患者的结石

C.用声波清洗精细的机械

D.人突然暴露在150dB的噪声环境中,鼓膜会破裂出血

答案

答案:A

题目分析:声音可以传递信息,如:隆隆的雷声预示着一场可能的大雨,“声呐”的利用、医用“B超”等;声音能够传递能量,如:利用声波来清洗钟表等精细的机械,“超声波碎石”等.

A、蝙蝠靠超声波捕食,利用了声音可以传递信息,符合题意;

B、利用超声波消除肾结石患者的结石,说明了声音可以传递能量,不符合题意;

C、用声波清洗精细的机械,说明了声音可以传递能量,不符合题意;

D、人突然暴露在150dB的噪声环境中,鼓膜会破裂出血,说明了声音可以传递能量,不符合题意.

故选A.

点评:本题考查了声音的利用,利用声可以传递信息,也可以传递能量,属于基本内容

选择题
阅读理解

Britons Learn to Forgive

LEEDS, England ─ A Leeds University psychology (心理学) professor is teaching a course to help dozens of Britons forgive their enemies.

“The hatred we hold within us is a cancer,” Professor Ken Hart said, adding that holding in anger can lead to problems such as high blood pressure and heart disease.

More than 70 people have become members in Hart’s first 20-week workshop in London ─ a course he says is the first of its kind in the world.

These are people who are sick and tired of living with a memory.They realize their bitterness is a poison they think they can pour out, but they end up drinking it themselves, said Canadian-born Hart.

The students meet in groups of eight to ten for a two-hour workshop with an adviser every fortnight.

The course, ending in July, is expected to get rid of the cancer of hatred in these people.“People have lots of negative attitudes towards forgiveness,” he said, “People confuse forgiveness with forgetting.Forgiveness means changing from a negative attitude to a positive one.”

Hart and his team have created instructions to provide the training needed.

“The main idea is to give you guidelines on how to look at various kinds of angers and how they affect you, and how to change your attitudes towards the person you are angry with,” said Norman Claringbull, a senior expert on the forgiveness project.

Hart said he believes forgiveness is a skill that can be taught, as these people “want to get free of the past”.

小题1:From this passage we know that _________.

A.high blood pressure and heart disease are caused by hatred

B.high blood pressure can only be cured by psychology professors

C.without hatred, people will have less trouble connected with blood pressure and heart

D.people who suffer from high blood pressure and heart disease must have many enemies小题2:In Hart’s first 20-week workshop, people there can ________.

A.meet their enemies 

B.change their attitudes towards bitterness

C.enjoy the professor’s speech

D.learn how to quarrel with others小题3:If you are a member in Hart’s workshop, you’ll ________.

A.pay much money to Hart

B.go to the workshop every night

C.attend a gathering twice a month

D.pour out everything stored in your mind小题4:The author wrote this passage in order to ________.

A.persuade us to go to Hart’s workshop

B.tell us the news about Hart’s workshop

C.tell us how to run a workshop like Hart’s  

D.help us to look at various kinds of angers