题干

如图所示声波的波形图,下列说法正确的是(   )

A:甲、乙的音调和响度相同

B:甲、丙的音调和音色相同

C:乙、丁的音调和音色相同

D:丙、丁的音色和响度相同

上一题 下一题 0.0难度 选择题 更新时间:2015-03-26 08:45:50

答案(点此获取答案解析)

A

同类题4

任务型阅读

    Recently,a very simple question became widely spread online: What China should be proud of?____

    Lanlan, whose real name is Negar Kordi, is from Canada.She came to China five years ago and is a student at Ningbo University.Now she has 120,000 fans on the Internet and the number is still growing.

    Lanlan loves China.____

    “It is the easiest country in which to find a job.If you are not too lazy, it is really very simple to find a job in China. I believe there're more job chances here than in any other country in the world.”

    “____About 400million Chinese are studying English.If they can speak good English in the future, China will have the greatest number of English speakers of any non-English speaking country.”

    “The speed of Chinese trains is fast. From Ningbo to Beijing, the train runs 1, 365kilometers for seven hours and the ticket fare is only 595yuan.”

    “Its public security is great.____ I have travelled in many countries,and I think China really is very safe.”

    “There are much more things China should be proud of. Many Chinese people often complain about China. At first, I believed that they didn't like China or that they loved western countries. But later, I realized that they just set a very high standard for China.____ Actually, China must be much better than other countries.”

A.The foreign language level is surprising.

B.This country of 1.4billion people makes me feel safe.

C.A foreign girl living in China gave a very touching answer.

D.They believe that it's not enough to be number one in the world.

E.She believes China will be the strongest country in the world in future.

同类题5

阅读理解

    Nervous suspects locked up in Britain's newest police station may feel relieved by a pleasant yellow color on the door . If they are close to confessing(供认)a crime , the blue on the wall might tip the balance .

    Gwent Police have abandoned colors such as greys and browns of the 20th-century police cell(牢房)and have used color psychology to decorate them .

    Ystrad Mynach station , which recently opened at a cost of £5 million has four cells with glass doors for prisoners who suffer from claustrophobia(幽闭恐怖症). Designers have painted the frames yellow , which researchers say is a calming color . Other cells contain a royal blue line because psychologists believe that the color is likely to encourage truthfulness .

    The station has 31 cells , including 12 with a “live scan” system for drunken or disturbed prisoners , which detects the rise and fall of their chest . An alarm alerts officers if a prisoner's breathing stops and carries on ringing until the door is opened .

    Designers and psychologists have worked for years on color . Blue is said to suggest trust , efficiency , duty , logic , coolness , thinking and calm . It also suggests coldness and unfriendliness . It is thought that strong blues will stimulate clear thought and lighter , soft colors will calm the mind and aid concentration .

    Yellow is linked with confidence , self-respect and friendliness get the color wrong and it could cause fear , depression and anxiety , but the right yellow can lift spirits and self-respect .

    Ingrid Collins , a psychologist who specializes in the effects of color , said that color was an “ energy force ” . She said : “ Blue does enhance communication but I am not sure it would enhance truthful communication . ”

    Yellow , she said , affected the mind . Red , on the other hand , should never be considered because it could increase aggression . Mrs. Collins praised the designers for using colors in the cells . Gwent is not the first British force to experiment with color to calm down or persuade prisoners to co-operate , In the 1990s Strathclyde Police used pink in cells based on research carried out by the US Navy .