土壤缓冲性
参考答案:
对酸碱变化的抵抗能力,叫做土壤的缓冲性能或缓冲作用。
Did you ______ your boss ______ a pay increase? [ ]
A. ask, to
B. asked, for
C. ask, for
D. asked, as
“轻烟拂渚,微风欲来”描述的是()的迷人景色。
A.南北湖
B.南湖
C.东钱湖
D.鉴湖