土壤酸碱度
参考答案：
是衡量土壤中酸碱含量多少的一句术语。PH值小于7的为酸性土，PH值大于7的为碱性土。
肺阴亏耗型咳嗽的治法是（）
A.滋阴
B.清热
C.润肺
D.化痰
E.止咳
She was very hardworking ________he was very lazy.As a result，she passed the examination，but he
failed.[ ]
A．when
B．since
C．while
D．as
