问题
选择题
This also keeps the air,soil,water crops________ chemicals.
A.out of
B.out from
C.free of
D.rid of
答案
答案:C
题目分析:固定搭配free of…免受…的伤害;句义:这个总是能够让空气,土壤和水生物免受化学物质的伤害。根据句义说明C正确。
This also keeps the air,soil,water crops________ chemicals.
A.out of
B.out from
C.free of
D.rid of
答案:C
题目分析:固定搭配free of…免受…的伤害;句义:这个总是能够让空气,土壤和水生物免受化学物质的伤害。根据句义说明C正确。