各类餐馆、快餐店、小吃店的凉菜间面积应占食品处理区面积的()以上,并且最小的凉菜间面积应大于()平米。
A、10%,10
B、8%,10
C、10%,5
D、8%,5
参考答案:C
—Where is Mr. Yu,do you know?
—Well,it's hard to say. But I heard him _____ loudly here just now. [ ]
A. was reading
B. reading
C. had read
D. to read
已知函数y=ax3+bx2+6x+1的递增区间为(-2,3),则a,b的值分别为______.