be expert in与be expert at 的区别

be expert in与be expert at 的区别 be expert at与be good at,be expert in与be good in, an expert on和be expert in的区别 be expert at doing 还是in doing 是be an expert in/at/on ,还是be expert in/at/on? be expert at和excel in的用法 Are there things that must be expe.的意思 be expert on in at有什么区别都可以用吗有什么区别 What does she want to be in the future?（用computer expert 回答）很麻烦.沫沫沫 求翻译：她擅长画画 (be expert at) be expert at怎么用 举几个例句 l want to be a computer expert什么 意思 i to want a be computer expert 连词成句 there being 与there to be有何区别It is fairly common in Africa for there ________ a group of expert musicians surrounded by others who also join in the performances.A being B to be C be 这个题目为什么要选B而不能选A 英语时态语态,选什么?japan's population was largest in 2006.it_to fall below 100 million by the middle of this century.Ais expe cted Bis expecting Chas expected Dwill be expected 英语翻译Expert systems represent knowledge in sets of ‘if-then-else’ rules.Propositions are proven by discovering a chain of rules.This may be done through either forward or backward chaining.In forward chaining.Expert systems have had a meas be involved in与be engaged in的区别 be in the 与be in use有什么区别