导游服务经济属性要求导游人员树立商品经济的观念,把提高导游服务质量与提高经济效益结合起来
参考答案:UNKNOWN
We regret _____ that the movie was not worth _____. [ ]
A. to say; to see
B. to say; seeing
C. saying; to see
D. saying; to seeing
下列软件中,不是操作系统的是( )。
A.Linux
B.UNIX
C.MS DOS
D.MS Office