- 搜标题
- 搜题干
- 搜选项
单项选择题
The oil is drawn from a drain tank through _____, one of a pair of pumps, into one of fine filters.
The oil is drawn from a drain tank through _____, one of a pair of pumps, into one of fine filters.
A.a strain tank
B.a head tank
C.a service tank
D.a strainer
A.
A.a
B.a
C.a
D.a
A.a
B.a
C.a
D.a
