2. 外语
  3. A. show that organic crops are safer than conventional ones B. be specially trained C. improve soil quality D. poison you E. be

A. show that organic crops are safer than conventional ones B. be specially trained C. improve soil quality D. poison you E. be

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问题 A. show that organic crops are safer than conventional ones
B. be specially trained
C. improve soil quality
D. poison you
E. be eaten
F. affect their nutritional content
There is no convincing evidence to______.
选项
答案A
解析 题意：没有令人信服的证据表明有机作物比常规作物更安全。文章第三段第一句指出，有机农业经常宣称比常规农业更安全，然而全球范围内关于有机农业的研究却反驳了这一观点。A项“show that organic crops are safer than conventional ones”(表明有机作物比常规作物更安全)与原句意思相符，故选A。
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