When did scientists come to realize how the atoms and molecules on the Earth mos

游客2024-06-27  11

问题 When did scientists come to realize how the atoms and molecules on the Earth mostlikely combined to make living things? [br] At the end of the last paragraph, the word "it" refers to ______.

选项 A、water
B、the liquid sample
C、a closed loop
D、an electric spark

答案 C

解析
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