2. 外语
  3. While nuclear weapons present grave ______ dangers, the predominant crisis of overpopulation is with us today.

While nuclear weapons present grave ______ dangers, the predominant crisis of overpopulation is with us today.

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问题 While nuclear weapons present grave ______ dangers, the predominant crisis of overpopulation is with us today.
选项 A、inevitable
B、constant
C、overwhelming
D、potential
答案D
解析 potential“潜在的”，与下文的today相对比。
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