题目

一传送带装置示意如图，传送带在AB区域是倾斜的，AB长度L=5.0m，B和A的高度差为h=1.0m．稳定工作时传送带运行的速度保持v=1.0m/s不变．现将大量的质量均为m= 4.0kg的小货箱一个一个在A处放到传送带上，放置小货箱的时间间隔均为T=1.0s，放置时初速为零，经传送带运送到B处．小货箱在传送带上先做加速运动，然后保持匀速运动，加速过程和匀速过程所用的时间之比为．传送带装置由电动机带动，传送带与轮子间无相对滑动，不计轮轴处的摩擦．求：    　　Eddie liked music very much when he was at school, but when he went to the college he decided to study medicine instead of music. When he passed his examinations and became a doctor, he had to work in a hospital for some time. There he found out that a lot of patients were happier and caused less trouble if pleasant music was played to them. When he got an office and began to work for himself, he decided to keep his patients happy by having a tape recorder in his waiting room to play beautiful music for them. But soon after the tape recorder had been put in, Eddie's nurse heard a woman, Who was sitting in the crowded waiting room one morning, complained, “Here we're all waiting to see the doctor, but he is just playing the violin in his office instead of doing his work.” (1) Eddie preferred to be ________. [　　] A．a musician instead of a doctor B．a doctor instead of a musician C．both a doctor and a musician D．a violin player (2) After he graduated he ________. [　　] A．first worked as a doctor then a singer B．first worked in his own office C．played the violin to many people D．first worked as a doctor for others for a time (3) What he found was ________. [　　] A．pleasant music could cause trouble B．many patients became happy when they listened to pleasant music C．a lot of patients didn't like pleasant music D．more trouble may be brought about when patients listened to pleasant music (4) Which of the following is true? [　　] A．Eddie put a tape recorder in his own office. B．Eddie put a tape recorder in the waiting room of his own office and made it play beautiful music in order to make his patients happy. C．Eddie worked in a hospital all the time. D．Beautiful music can cause no trouble. (5) The woman in the waiting room ________. [　　] A．didn't like to listen to music B．liked to listen to music C．thought that the doctor himself was playing the violin D．was waiting to listen to music in order to cure her illness