- 搜标题
- 搜题干
- 搜选项
单项选择题
A heater in the circuit facilitates warning of the engine prior to ____ by circulating hot water.
A heater in the circuit facilitates warning of the engine prior to ____ by circulating hot water.
A.starting
B.stopping
C.to start
D.to stop
A.
A.starting
B.stopping
C.to
B.to
A.starting
B.stopping
C.to
B.to
