作者taigoinwo (还是一只幼鼠)
看板Chemistry
标题[问题] 一题化学考古题
时间Mon Feb 4 20:42:05 2008
A material is made from Al, Ga, and As. The mole fraction of each element is
0.25,0.26, and 0.49,respectively. This material would be
(a) an n-type semiconductor
(b) a p-type semiconductor
(c) an insulator
(d) a metallic conductor because Al is present
(e) none of the above
这一题该怎麽做呢 请问板上高手
要选哪一个答案??
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1F：推 yoyo0000:C吧 02/06 01:51
2F：→ a88405971:我觉得是b耶@@" 因为3A族的比较多一点 02/07 00:52
3F：→ taigoinwo:请问 能不能说说选这个答案的理由 不太懂耶 02/07 13:05
4F：推 yoyo0000:他没有添加在4A族的元素里，所以应该不是半导体吧 02/08 22:05
5F：推 little1315: p-type semiconductor 02/10 22:55