be weak at与be weak in的区别是什么?

be weak at与be weak in的区别是什么? be weak in 和be weak at be weak 有这个短语吗?be weak at be weak at对,还是be weak in对?be weak at对,还是be weak in对? be weak/poor at/in是什么意思 be good at的反义词是be weak/bad at还是 be weak/bad in be good at 的反义短语是什么?要用到weak是be weak in还是at? do weak in 还是 be weak in? weak at与weak in的区别 He used to be weak. Weak forms fo be是什么意思 英文翻译请教“may be i'm weak in it be weak in; be weak at 这两个有什么区别?有人说be weak in 后面跟某科目,但是牛津高阶有一例句：Her school report shows that she is weak at/in arithmetic and biology. 与be weak in相对的是哪个词组 Do not be afraid to be weak. be weak in 后动词加ing? Be weak in getting on weii be weak at 还是be weak in 是不是两个都可以(老师好象讲过的),如果2选1,选哪个好?