be poor in和be poor at这两个哪个对?

be poor in和be poor at这两个哪个对? be in poor health. be poor at 等于什么 be poor be poor in和be weak in的区别 用 be poor in 造句 the poor are always poor和the poor always be poor有什么区别 people poor at one thing can be good at I am sorry that he should be in such poor health 这 You should be very friendly___too___the poor.原因? （ ）poor at English,I'm afraid I can't make myself（ ） A.To be Tony may be a good research worker,but he is very poor at hi