你忽略了1个问题：发电厂的效率vis汽车发动机的效率（哪个效率高？）

来源: 味苦于 2014-03-14 16:26:34 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.