下列物质属于溶液的是（ ）
A．蒸馏水
B．碘酒
C．泥水
D．牛奶
答案：B
yesterday，we went out for a wall
A．As a fine day
B．It was a fine day
C．It being a fine day
D．For it was a fine day
垄断竞争中厂商短期均衡时（）。
A、厂商获得超额利润
B、厂商处于亏损状态
C、厂商获得正常利润
D、上述情况都有可能
