单项选择题白细胞尿是指新鲜尿离心沉渣后每高倍镜视野白细胞数 A．0～3个 B．超过3个 C．超过5个 D．超过7个 E．超过10个
单项选择题If you are busy doing something else when a call comes in, pick up immediately and just tell the caller plainly that you are occupied. Honesty is always the best policy. A、正确 B、错误
