单项选择题
一克食盐(氯化钠)含有()。
A.3gNa,17gCl
B.0.5gNa,0.5gCl
C.0.6gNa,0.4gCl
D.0.4gNa,0.6gCl
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单项选择题
A.3gNa,17gCl
B.0.5gNa,0.5gCl
C.0.6gNa,0.4gCl
D.0.4gNa,0.6gCl