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【单选题】
当x分别为,正弦型函数y=5sin x取得最大值和最小值?A.
当x= 时，取得最大值 当x= 时，取得最小值
B.
当x= 时，取得最大值 当x= 时，取得最小值
C.
当x= 时，取得最大值 当x= 时，取得最小值
D.
当x= 时，取得最大值 当x= 时，取得最小值
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【简答题】Translate the following into Chinese The engine gives the power to the automobile. It can convert fuel into the energy that moves the automobile. And without the engine, the automobile can’t move, so ...
【单选题】Which of the following is NOT the result of polluting the search engine?
A.
Traffic jam in the Internet.
B.
Upsetting the consumers.
C.
Decreasing Google's credibility.
D.
Decreasing companies' profits.
【单选题】Which of the following operational conditions will occur to the diesel engine lube oil at extremely high temperature?
A.
The oil oxidizes and forms carbon deposits
B.
The viscosity increases
C.
Engine oil consumption decreases
D.
Lubricating qualities of the oil are enhanced
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