单项选择题
A.the steering
B.the driven gear
C.the turning gear
D.the timing gear
单项选择题 The selection of an oil from the （） depends to a great extent on the operating conditions, the design of the engine and the type of fuel to be burned.
单项选择题 The selection of an oil depends （） on the operating conditions, the design of the engine and the type of fuel to be burned.
单项选择题 The selection of a lubricating oil depends to a great extent on the operating conditions,（）.