电力营销服务时，与客户交接钱物时，应（），轻拿轻放，不抛不丢。
A.看清楚
B.唱收唱付
C.快速交接
D.不抛不丢
参考答案：B
求函数y=log2(x2-6x+5)的定义域和值域．
Most of the fans felt rather disappointed at the concert. They said it could have been _______ organized.
A．badly
B．worse
C．well
D．better
