局部骨组织被病理组织所取代称为()
A.骨质疏松
B.骨质软化
C.骨质破坏
D.骨质坏死
E.骨质增生硬化
参考答案:C
Besides hotels,there are also families visitors can experience the warmth and kindness of the local
people. [ ]
A. which
B. that
C. what
D. where
A、B两质点分别做匀速圆周运动,若在相同时间内,它们通过的弧长之比SA:SB=2:3而转过的角度之比φA:φB=3:2,则它们的线速度之比vA:vB=______;周期之比TA:TB=______.