创伤后包扎的目的是（）。
A.保护伤口
B.减少污染
C.固定敷料
D.帮助止血
E.以上全是
参考答案：E
解析：A、B、C、D均为包扎的目的。
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
招展价格的制定要充分考虑展会的发展阶段、（）、（）、会展地的经济水平、展区和展位情况等因素。
