2. 外语
  3. Our biological uniqueness requires that the effects of a substance must be verified by ________ experiments, even after thousand

Our biological uniqueness requires that the effects of a substance must be verified by ________ experiments, even after thousand

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问题 Our biological uniqueness requires that the effects of a substance must be verified by ________ experiments, even after thousands of tests of the effects of that substance on animals.
选项 A、controlled
B、random
C、replicated
D、human
E、evolutionary
答案D
解析 方法一：
- 方程等号：requires体现必须…，前后句意同义重复。
- 强词和对应：根据题意，我们的生物独特性要求必须通过“我们”(即“人类”)进行实验，因此空格和our取同。代入选项，controlled克制的／被实验对照的，random随机的，replicated被复制的，human人类的，evolutionary进化的。答案选D。
方法二：
- 方程等号：even表示转折，句内句意转折。
- 强词和对应：animals指向空格，取反，体现在“非动物”身上进行试验，选human。
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