David Wu
Which one is right? Now a paper in Science argues that organic chemicals in the rock come mostly room ______on earth rather than bacteria on Mars. A configuration B constitution C condemnation D contamination
Nov 27, 2014 1:32 PM
Answers · 2
The answer is D, but the question is also a little bit wrong. I think it should read: Now a paper in Science argues that organic chemicals in rocks come mostly from contamination on earth rather than bacteria on Mars.
November 27, 2014
Danny is correct.
November 27, 2014
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David Wu
Language Skills
Chinese (Mandarin), English
Learning Language
English