题目

A new bridge ____ across the river and is expected to open next year.A. is built         B. is being built     C. are built     D. has been built 答案：B有关我国人口和民族说法不正确的是（　　）A. 我国是世界上人口最多的国家 B. 我国人口基数大，人口增长快 C. 我国民族分布具有“大散居，小聚居，交错杂居”的特点D. 黑河-大理一线是重要的人口分界线