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When were the chemicals first used in America?A、Before the American Revolution.
When were the chemicals first used in America?A、Before the American Revolution.
游客
2023-11-05
43
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问题
When were the chemicals first used in America?
选项
A、Before the American Revolution.
B、Over thirty years ago.
C、Over two hundred years ago.
D、Before the discovery of potassium nitrate.
答案
A
解析
细节题。文中指出早在美国独立战争开始之前,欧洲人就开始(在美国这片殖民地上)使用化学肥料了。故选A。
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