The world's greatest sporting event, the Olympic Games, upholds the amateur idea that ______ matters is not winning but participating.
A. it
B. anything
C. everything
D. what
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His father is a ______ professor in a prestigious university.
A. respectful
B. respectable
C. respecting
D. respective
Which of the following is NOT an advantage of wind energy
A. Wind energy does not require the flooding of large land areas.
B. Wind energy produces no waste products.
C. The availability of wind energy is not dependent on the weather.
D. Wind energy does not produce thermal or chemical effluents.
曲线y=(x-1)2(x-3)2的拐点个数为______．
A. 0
B. 1
C. 2
D. 3
石痈的记载最早见于：
A. 《诸病源候论》
B. 《仁斋直指附遗方论》
C. 《后备急方》
D. 《外台秘要》
E. 《千金方》
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