单选题
How do you know that the oil pressure is a bit low?
A、
The warning light flashes only when the car runs at fast speed.
B、
The warning light flashes only when the car is slowing down.
C、
The warning light flashes continuously.
D、
The warning light flashes when the engine idles.
【正确答案】
A
【答案解析】
本题为细节辨析题。文中提到，当快速行驶时警示灯亮起，而当慢速行驶时警示灯熄灭，很可能意味着发动机只是有点缺润滑油。
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