未分类题
According to the passage, why are the chemicalsused in agriculture safe?
A.They
B.
B.They
C.
C.They
D.
D.They
E.
【参考答案】
C
细节题。作者在文中多次强调使用化学肥料并不会毒害土地,他说自从欧洲移民在美国定居就已经开始在这片土地上使用化......
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