单项选择题
If the atomizer holes are enlarged beyond the makers recommended size, the atomizer must be （）.
A.repaired B.replaced C.replenished D.repeated
单项选择题 If diesel oil in this tank is used, the （） of the oil must not exceed 120 degree F.
单项选择题 Of a kind of liquid is used to cool the diesel engine, it is invariably called （）
单项选择题 If （） are taken at regular intervals, any unequal distribution of load will be easily found out.
