QUOTE Created By 老杨同志 At 2006-7-22
A由B生成.B在沸水中生成C,C在空气氧化成D,D有臭鸡蛋气味.请问ABCD各是什么物质?
请事先知道答案的人事别发言.
QUOTE Created By 又见炊烟 At 2006-7-22
[quote]QUOTE Created By 老杨同志 At 2006-7-22
A由B生成.B在沸水中生成C,C在空气氧化成D,D有臭鸡蛋气味.请问ABCD各是什么物质?
请事先知道答案的人事别发言.
QUOTE Created By 兔子1 At 2006-7-24
是会下蛋的母鸡
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