2. 外语
  3. In 1856 an English Achemistry produced a Bbrightly colored dye Cwhile he was trying Dto make a new drug.

In 1856 an English Achemistry produced a Bbrightly colored dye Cwhile he was trying Dto make a new drug.

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问题 In 1856 an English Achemistry produced a Bbrightly colored dye Cwhile he was trying Dto make a new drug.
选项 A、 
B、 
C、 
D、 
答案A
解析
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