问题
单项选择题
----The baby is hungry. ----But there's（）milk in the bottle.
A.little
B.a little
C.few
D.a few
答案
参考答案：A
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----The baby is hungry. ----But there's（）milk in the bottle.
A.little
B.a little
C.few
D.a few
参考答案：A
数之比为1:3时，正好完全发生氧化还原反应，X在还原产物中的化合价为( )