2. 外语
  3. The UFO phenomenon is not new to us, but scientists are still not able to offer any______ explanations.

The UFO phenomenon is not new to us, but scientists are still not able to offer any______ explanations.

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问题 The UFO phenomenon is not new to us, but scientists are still not able to offer any______ explanations.
选项 A、specific
B、rational
C、virtual
D、literal
答案B
解析 形容词辨析 specific“明确的，特殊的”；rational“理性的，合理的，推理的”；virtual“虚拟的，实质的”；literal“文字的，照字面上的”。
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大学英语四级

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