桂花盛开,能闻到花的香味,说明 [ ]
A.分子很小
B.分子可分
C.分子在不停地运动
D.分子之间有间隔
答案:C
— _________ do you have PE lessons?
—Three times a week. [ ]
A. How long
B. How soon
C. How many
D. How often
下图中,某山坡地质景观的岩类和地质构造分别是()
A.岩浆岩背斜
B.变质岩向斜
C.沉积岩背斜
D.花岗岩向斜