若F&39;(x)=f(x),x∈I,则F&39;(x)是f(x)在区间I上的()
A. 不定积分
B. 一个原函数
C. 导函数
D. 反函数
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This means that that it is a good idea to try to learn the customs of the place you
The four of us get up early and meet at the golf course before eight o'clock-otherwise, it gets too crowded.(英译汉)
下列函数中,在(-∞,+∞)内严格递增且函数值大于零的是()