问题
填空题
磁悬浮列车在平直的路面上匀速行驶时，列车水平方向上所受合力______（选填“向前”、“向后”或“等于零”），此时列车相对于路旁的树木是______（选填“运动”或“静止”）的．
答案
磁悬浮列车在平直的路面上匀速行驶，处于平衡状态，列车水平方向上所受合力等于零；
列车相对于路旁的树木位置不断变化，列车是运动的；
故答案为：等于零；运动．
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磁悬浮列车在平直的路面上匀速行驶时，列车水平方向上所受合力______（选填“向前”、“向后”或“等于零”），此时列车相对于路旁的树木是______（选填“运动”或“静止”）的．
磁悬浮列车在平直的路面上匀速行驶，处于平衡状态，列车水平方向上所受合力等于零；
列车相对于路旁的树木位置不断变化，列车是运动的；
故答案为：等于零；运动．
| 阅读理解。 | |||
| One day Mozart, a great musician, saw an old man sitting in a street corner (角落) with a hat in front of him. The old man could see __1__ because he was blind (瞎的). He was playing the violin. It was a beautiful piece __2__ Mozart. But the hat was empty because no money was put into it. "Do you often __3__ Mozart's music?" Mozart asked. "Yes, sir," the old man answered. "Everyone knows Mozart and likes his music." " __4__ do you live with?" Mozart asked again. "None," the old man said sadly. "I'm __5__ and I have to make a living by playing the violin." Mozart __6__ over the violin from the old man and he, himself, began to play. He played so well that all the people passing by stopped __7__ to the wonderful music and soon the man's hat was full of __8__. The old man was __9__ and asked Mozart, "Who are you, sir?" "I'm a poor __10__ like you," Mozart said. | |||
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