一个平行四边形的一条边长10厘米,比另一条邻边短2厘米,这个平行四边形的周长是多少厘米?
(10+10+2)×2,
=22×2,
=44(厘米),
答:平行四边形的周长是44厘米.
—Well, honey, I'm sorry but I have to board.
—________, and God bless you when you are in Libya.[ ]
A. Enjoy yourself
B. Do take care
C. Have a nice trip
D. Mind your steps
将N级放大电路串联后,放大倍数和通频带将如何变化?