【简答题】There is also a network of dirt airstrips, which was fortunate for me, as I had no time for the two-and-a-half week trek to my destination.
【单选题】The senior partner, Oliver Lambert, studied the resume for the hundredth time and again found nothing he disliked about Mitchell Y. McDeere, at least not on paper. He had the brains, the ambition, the...
【单选题】已知函数y=cos2xsinx,则函数的奇偶性是
【单选题】函数y=xsinx在[-π,π]上的图象是( )
【单选题】It seems that the cold winter ______.
A.
increases the ability to think
B.
is the best time for thinking
C.
is better for thinking than is very warm weather
D.
decreases the ability to think
【单选题】下列说法中,正确说法的序号是 ( ) 1y=sinx·cosx 是奇函数; 2y=tanx 是奇函数; 3y=xsinx 是偶函数.
【判断题】函数 f(x)=xsinx是偶函数 , 其图形关于 y轴对称 .