答案：A
相距1000km的两市在比例尺为1：30000000的地图上的距离约是（ ）cm (精确到0.1)；某市规划筹建一个开发区，这个开发区在1：50000的地图上面积是30cm2，实际占地面积约为（ ）km2 。
Where goods are to be dispatched by road, rail or air instead of by sea, the documentary credit will call for a road transport document or a rail transport document or an airway bill instead of（）.
A．a bill of exchange
B．a certificate of origin
C．a bill of lading
D．a certificate of insurance
