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(单选题) 12: Magnesium has a specific gravity of 1.74, which means that ___ 1.74 times as much as an equal volume of water.
A: it is weighed
B: weighing it
C: its weight
D: it weighs
(责任编辑：admin) |
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(单选题) 12: Magnesium has a specific gravity of 1.74, which means that ___ 1.74 times as much as an equal volume of water.
A: it is weighed
B: weighing it
C: its weight
D: it weighs
(责任编辑：admin) |