问题
问答题 简答题
计算速度随深度的相对变化率β
知：V（z）=V0（1+βz）∧（1/2），V（z）=2624m/s，V0=1800m/s，z=3325m.
求：β=？
答案
参考答案：
∵（见式08BD-16）
∴β=3.384×0.0001（1/m）
速度随深度的相对率为3.384×0.0001（1/m）。
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计算速度随深度的相对变化率β
知：V（z）=V0（1+βz）∧（1/2），V（z）=2624m/s，V0=1800m/s，z=3325m.
求：β=？
参考答案：
∵（见式08BD-16）
∴β=3.384×0.0001（1/m）
速度随深度的相对率为3.384×0.0001（1/m）。
| 完形填空。 | |||
Mozart and an Old Performer One day Mozart (莫扎特)saw an old blind street performer (卖艺人) playing the violin in the street corner __1__ a hat in front of him. He found out the old man was __2__ one of his compositions (作品).The old man played for __3__ , but still nobody put any money into his hat. Mozart asked the old man, "Do you often play compositions by Mozart?" "Yes, __4__ ," answered the old man. "Now, everybody knows Mozart and likes his music." "Do you __5__ a living by playing the violin?" The old man said he __6__ Mozart took over the violin from the old man and began to play. He played so well __7__ all the passer-by stopped to listen the wonderful music and soon the old man felt very __8__ that the man could play so well. He asked Mozart, "Who are you, sir?" "Your colleague (同行) , a poor __9__ like you." Then Mozart gave the __10_ back to the old man and went away. | |||
( )1. A．on | B．by | C．with | D．to |