对土壤和作物都有利的垃圾堆肥肥料粒度为（）。
A.≤10mm
B.≤5mm
C.≤2mm
D.2～5mm
E.≥5mm
参考答案：B
My uncle is a careful driver, but he doesn’t drive as _________ as my friend.
A．careful
B．more carefully
C．carefully
D．careless
为什么人员严禁进入采空区？
