
图中给出了某正弦电压的波形图,由图可知,该正弦量的()。
A.有效值为10V
B.角频率为314rad/s
C.初相位为60°
D.周期为(20—5)ms


A.有效值为10V
B.角频率为314rad/s
C.初相位为60°
D.周期为(20—5)ms
There is a passage with ten blanks. You are requiredto select one word for each blank from a list of choices given in a word bankfollowing the passage.
For thirty years now I have been studying my fellowmen. I do not know very much about them. I shrug my shoulders when people tell me that their first ____1____ of a person are always right. I think they must have small ____2____ or great vanity. For my own part I find that the longer I know people the more they ____3____me.
These reflections have ___4___ to me because I read in this morning’s paper that Edward Hyde Burton had died at Kobe.He was a ___5___ and he had been in business in
A. startling B. insight C. describe D. definite E. impressions F. frail G. merchant H. curly | I. height J. account K. evidently L. puzzle M. Unless N. neatly O. occurred |