用our floor first room dining is on the这些词拼成一句话

用our floor first room dining is on the这些词拼成一句话 The floor above the ground floor is the first floor.为什么不用on 用above first floor怎么读 in the first floor first floor怎么读 first floor的意思 our m______is on the first floor补全括号里的单词,完成句子. ______classroom is on the first floor._____is on the second floora.our,their b.ours,their c.our,theirs 英国用ground floor 表达 美国用first floor 为什么呢 first floor、second floor……几层几层前面用介词at 还是in? 是用on the first floor 因为floor是名词 那at呢 是用on the first floor 因为floor是名词 那at呢? ground floor 和 first floor的区别 ,It's ___the first floor 介词用什么,为什么 at the first floor还是on the first floor first floor的英文近义词 on the first floor是什么意思 on the first floor 中为什么要用“first”序数词呢