_______ water is to fish, so air is to man.
A. Though
B. Since
C. If
D. As
Theworkershave_______coffeebreakintheafternoon.
A. ten minutes
B. a ten-minute
C. a ten-minutes
D. ten minute
Hefellinlovewith_______girl.
A. a blue-eye
B. a blue eye
C. ablue-eyed
D. blue-eyed
电容式接近开关能够检测的对象包括( )。
A. 金属
B. 木头
C. 塑料
D. 气体