题目

“嫦娥一号”月球探测器在环绕月球运行过程中，设探测器运行的轨道半径为r，运行速率为v，当探测器在飞越月球上一些环形山中的质量密集区上空( )A．r、v 都将略为减小B．r、v都将保持不变C．r将略为减小，v将略为增大D．r将略为增大，v将略为减小  答案：C      解析:当探测器在飞越月球上一些环形山中的质量密集区上空时，受到的万有引力即向心力会变大，故探测器的轨道半径会减小，由v＝ 得出运行速率v将增大，故选C. It gives me great pleasure today to say a few words in praise of a man we will all miss very much. To be honest, I can't imagine we will do without him when he's gone.　　Bill Masters almost single-handed built up our sales force in the Houston area and developed the market position that we enjoy today. In only six years, he has brought the firm from a very low fifth position in the area sales to the point where we now outsell all but one of our competitors. Not only have we got 37 per cent of the market under Bill's leadership; we are increasing our share with each passing month.　　As you know, the company has moved Bill to northern California to work his sales magic in one of this company's most competitive(竞争的) areas. But we know that if anyone can do it, Bill Masters can, and I know you all join me in wishing him the best of luck in his new work.小题1:The speech was made _______.A．at a welcome meetingB．at the opening of a new school termC．when somebody was leavingD．when they had a new manager小题2: How long did Masters worked there?A．37 yearsB．less than 5 yearsC．about six yearsD．since he began to work小题3:When Bill started to work in Houston area, he had _______to help him.A．many peopleB．nobodyC．about 37 peopleD．very few people小题4:Bill increased the company's sale _______.A．by 37 per cent every monthB．to the second largest in the areaC．to be the fifth largest in the areaD．five times as much as before