下列航海家的航海活动，能证明地球是球形的是[ ]
A．哥伦布航海
B．郑和下西洋
C．麦哲伦环球航行
D．达·伽马航海从欧洲到印度
答案：C
城市规划信息化的未来发展趋势表述正确的是______。
A．技术应用科技化 B．规划信息保密化C．基础数据共享化 D．发展规划合理化
Mark was a student at this university from 1999 to 2003, he studied very hard and was
made Chairman of the Students’ Union. [ ]
A.during which time
B.for which time
C.during whose time
D.by that time
