2. 外语
  3. Now a paper in Science argues that organic chemicals in the rock come mostly from ______ on earth rather than bacteria on Mars.

Now a paper in Science argues that organic chemicals in the rock come mostly from ______ on earth rather than bacteria on Mars.

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问题 Now a paper in Science argues that organic chemicals in the rock come mostly from ______ on earth rather than bacteria on Mars.
选项 A、configuration
B、constitution
C、condemnation
D、contamination
答案B
解析 形近名词词义辨析题。A．configuration“轮廓，结构”；B．constitution“宪法，体质，构造”；C．condemnation“谴责，定罪”；D．contamination“污染”。
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