翻译
1.It is essential that the imbalance be redressed and that the material selected to provide the corrective factor also be economically sensible. 2.If heavy use of radar becomes questionable,the Pentagon will have to rethink its whole strategy.
答：选择blook意为“外表,长相,相貌”,是可数名词,但是多以复数形式出现。排除a和c,从语法角度来讲b和d都对,根据英语用词高效原则(即用最少的词表达最多的意思...详情>>
问：a friend of my father \a friend of my fa...
答：其实没有这么严格的，哪个都能达意的，不过严格来说，第一个对详情>>
