中国现存的一座最大的古代园林是北京的__________，而古典园林的代表作是江苏的以水为主题的__________。
颐和园；苏州园林
__________,we must believe in ourselves and believe that we can do something well.
A．However life is difficult
B． However is life difficult
C．However difficult life is
D． However difficult is life
若FTP服务器开户了匿名访问功能，匿名登录时需要输入的用户名是（）。
A．root
B．user
C．guest
D．anonymous
