TheopportunitytoexploreandplayandtheencouragementtodosoCan________theperformanceofmanychildren．
设函数y=sinx^2+2x，求dy
Thelocaltextilemillhas800workers,_____700arewomen.
货车行驶72km用时1小时，速度V与行驶时间t的关系如图所示，则V0=（）
Youshouldnothavedriventhatcarwithitsbrakesoutoforder.You_____aserious
