Flowers are always a__ (please)sight, especially in the city.
设y=xcosx,求y&39;.
Heissofoolish竟然认敌为友。
解释下列括弧内的词语:
此其过江河之流,不可为(量)数。
设z=z(x,y)由方程ez-xy2+x+z=0确定,求dz.
不管谁犯了法willbepunished.