an expert on和be expert in的区别

an expert on和be expert in的区别 是be an expert in/at/on ,还是be expert in/at/on? an expert on losing an expert in/at/on/with有什么区别?例子：1.an expert in/at teaching small children意思就是说an expert in和an expert at通用对吗?2.an expert in economics3.an expert on foreign affairs4.an expert with the needles I wanna be an expert on English,how I can do this?Is there anybody who can help meon this? an expert in/on/at有什么区别 I am still ________ on the finances of the league and I'm not going to pretend to be.A.no expert B.not an expert C.not expert D.none expert请解释下为什么选AB不是更完整吗? be expert at和excel in的用法 he considers himself an expert on the subject 我认为是 he considers himself is an expert on the subject 我是按照中文翻译的就是这样?语法新手. 关于one和that区别的A beginner's painting can't be compared to_____of an expert.A.that B.one C.any D.itkey:A When we talked about the computer,he pretended to be an expert.翻译 be expert on in at有什么区别都可以用吗有什么区别 Are there things that must be expe.的意思 be expert in与be expert at 的区别 He considers himself an expert on the subject,in fact,he is poor on it.怎么译 Unfortunately, the expert from Australia refused to __.A operating B operate C operate on D be operate on Berkeley是哪?Professor Harley Shaiken is an expert on unions at the University of California at Berkeley. 【辨析】compare to/withA beginner’s painting can’t be compared to that of an expert.这句话应该是一个初学者的画作无法和专家的相提并论,请问,compare to 不应该是用于比喻吗,为什么不是with,