单项选择题

What will happen to the engine when oil pressure drops

A．It will be damaged when the engine stops working.
B．Very soon it will be severely damaged.
C．Serious damage to it is not likely to occur within the first few minutes.
D．Damage may occur to the engine when you drive the car at high speed.
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单项选择题
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.
单项选择题
It seems to the writer that ______.
A．it is easy to do harm to our environment
B．the planet on which man lives is too small for man to survive
C．man should not create his culture and civilization too rapidly
D．man does not want to admit the danger of what he has done to the environment
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