A:how did you go there
B:how many pieces of bread you buy
C:how much milk did you buy
D:if you bought my favorite ice cream
蝗虫是一种危害极大的农业害虫,那么消灭蝗虫的最佳时期是( )
某公司2月份的利润为160万元,4月份的利润250万元,则平均每月的增长率为____