俄国土壤学家道恰耶夫最早把土壤剖面分为三个发生层,即表土层、淀积层(聚积层)、()
参考答案:母质层
He is such a lazy man _______ nobody wants to work with him.
A.that
B.as
C.whom
D.who
Be careful that a good name of a product doesn’t _______ mean good quality of it.
A.alternatively
B.approximately
C.obviously
D.necessarily