Somemoleculesarelargeenough________(see)undertheelectronicmicroscope.
更新时间:2024-11-24 03:15:37Wood does not conduct electricity; ________.
To succeed in a scientific research project ________.
Hot metal ________ as it grows cooler.
We were busy ________ (get) things ready for the trial production when he phoned us.
Onlywhenyouhaveobtainedsufficientdata________cometoasoundconclusion.
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