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
There is _____ like the taste of a glass of cold milk-it has been described as the perfect food by westerners. [ ]
A. something
B. anything
C. nothing
D. everything
不同波长的光表现出不同的颜色，下列波长由长到短的排列顺序是
A．红、黄、蓝、紫
B．红、蓝、黄、紫
C．红、黄、紫、绿
D．紫、蓝、黄、红
E．绿、紫、蓝、红
