()是将有机质中的氧、氮、硫、磷等元素分离出来,使碳、氢在有机质中富集。
A.运移方式
B.细菌作用
C.有机质
D.地质作用
参考答案:B
Ted came for the weekend wearing only some shorts and a T-shirt, ____ is a stupid thing to do in such weather.
A.that
B.what
C.which
D.when
水循环倒流