问题 问答题

现在不少同学都有“单放机”和立体声的耳机,在课余时间听一听音乐,大有身临其境的感觉,你能说一说立体声是怎么回事吗?

答案

同一声源到的距离往往不相等,加上人的头部 对声音有掩蔽作用,就会两只耳朵造成声音的时间差和响度差, 比如,从左边发出的声音先到达左耳,再到达右耳,所以 左耳听到的声音比右耳强一些,这是人耳的双耳效应. “单放机”放音时使用的是立体声录音带,这种录音带在录制时,用了两个或两个以上的传声器录音,从左右两 个位置把声源发出的声音分别记录在同一磁带上,即常 见双声道录音.重放时,又相应地用了两个以上的喇叭或耳机听筒,分别放出左右两个声道录下来的声音,这样充分利用了人的双耳效应,所以听起来有丰富的立体感,有身临其境的感觉。

完形填空

Pablo Picasso (1881-1973) was born is Spain. There is no doubt he was one of the ________artists of the twentieth century. ________ he was a small child, he could draw and paint very well. ________the age of nineteen years old, he visited art galleries(陈列室) in Paris to learn ________ other artists. Picasso was _________ important painter who invented new ways of painting. For one period of his life, he used mainly blue in his paintings. Then with his friend, Georges Braque, he invented a way of painting called Cubism(立体派). He tried ________ round shapes look flat(公寓).

When a war broke in Spain, it made Picasso very _______ and angry. During the war, a town ________ Guernica was destroyed. So he made a large painting, ________ the name of Guernica, about the war. In the picture, a woman is crying and a horse is making a loud high noise. This painting, which is very famous, shows us _________ Picasso felt about the war.

小题1:A. great               B. greater          C. greatest

小题2:A. When            B. Where          C. What

小题3:A. In            B. At          C. On

小题4:A. front               B. from         C. for

小题5:A. a              B. the          C. an

小题6:A. to make         B. make        C. makes

小题7:A. happy            B. glad           C. sad

小题8:A. call               B. called       C. calls

小题9:A. with             B. without          C. of

小题10:A. what             B. how          C. where

选择题