成本核算能合理地确定菜点的（ ）打下基础。
C
暂无解析
曲线在点（0，-1）处的切线方程为________.
设平面区域,则D绕y轴旋转所成旋转体体积为_____
设函数y=sinx^2+2x，求dy.
WeweretoldthatSuewouldbeidealforthejob,butshe________badlywhenwetalkedtoher.
Thewealthofacountryshouldbemeasured________thehealthandhappinessofitspeopleaswellasthematerialgoodsitcanproduce.