问题
选择题
The baby is only ______. [ ]
A. six months old
B. six monthes old
C. six month old
D. six old months
答案
答案：A
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The baby is only ______. [ ]
A. six months old
B. six monthes old
C. six month old
D. six old months
答案：A
cC(g) +dD(g),C物质的质量分数（C%）与温度、压强的关系如图所示，下列判断正确的是 （ ）