I know a wonderful restaurant where we can have lunch next week.我知道一家很不错的餐厅，下周我们可以去那里吃午饭。I have started planning out what I shall be doing next week.我已开始详细安排下周要干的事儿了。All those invited to next week'speace conference ...
Crystals may be insulators, semiconductors, or conductors.晶体可以是绝缘体, 半导体, 或导体.Semiconductors containing such impurities are called p - type semiconductors.含有这类杂质的半导体叫做P型半导体.It is not possible to name any particular conduc...