相似原理的相似没包括()相似。
A.几何相似
B.运动相似
C.动力相似
D.边界相似
参考答案:D
We need __________ at the hotel for __________ because of the heavy snow.
A.stay; short stay
B.staying; a short stay
C.to stay; short stay
D.to stay; a short stay
岁寒三友指什么?