across,along,over,to,up,down,through,round中,哪些是介词?

来源:学生作业帮助网 编辑:作业帮 时间:2024/06/04 00:24:43

across,along,over,to,up,down,through,round中,哪些是介词?

across,along,over,to,up,down,through