A：建筑物矮小
B：聚落稀疏
C：聚落密集
D：聚落规模小
—Alice, why didn’t you come yesterday?
—I ______, but I had an unexpected visitor.
——The relation between the two countries gets _________. A war seems to break out soon .——I hope they will make peace with each other .
下列图形是中心对称图形的是（ ）
我国的直辖市有 ( )①北京 ②上海 ③哈尔滨 ④天津 ⑤深圳 ⑥重庆
