患者，男，颈项、背部大量约黄豆大小白色斑片，其上覆有少许细碎鳞屑，可诊断为：
A．水剂B．水粉剂C．软膏D．油剂E．粉剂
参考答案：B
They considered___ a computer, which was considered ___ a great help in their work.
A．to buy；to be
B．buying；being
C．to buy；being
D．buying；to be
下面是济南大明湖小沧浪园联：四面荷花三面柳，一城山色半城湖。
请解释“一城山色半城湖”。
