光通过人体组织时不可产生()。
A.折射
B.反射
C.振荡
D.散射
E.压力
参考答案:C
— I have tried very hard to find a solution to the problem, but in vain.
— Why not consult with Frank? You see, ________. [ ]
A. great minds think alike
B. two heads are better than one
C. a bird in the hand is worth two in the bush
D. it's better to think twice before doing something
为顾客上菜、送茶水、换骨盆时不能靠顾客的()太近。
A.身体
B.肩部
C.手部
D.头部