下载APP
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】在完全竞争市场上,如果某行业的厂商的产品价格等于平均成本,那么( )。
A.
既有广商进入该行业也有厂商退出该行业
B.
新的厂商进入该行业
C.
既无商进入该行业也无厂商退出该行业
D.
D 、原有厂商退出该行
【单选题】最佳修复方案是
A.
直接改为活动义齿修复
B.
采用种植固定义齿修复
C.
全冠修复基牙后再改为活动义齿修复
D.
增加前端基牙数再行固定修复
E.
增加前端基牙数目再行固定活动联合修复
【单选题】Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing (裁判) decisions that denied victory to their team. A researcher was appointed to study the performanc...
A.
The ideal retirement age for an experienced football referee is 35.
B.
Age should not be the chief consideration in choosing a football referee.
C.
A football referee should be as young and energetic as possible.
D.
An experienced football referee can do well even when in poor physical condition.
【单选题】Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing(裁判) decisions that denied victory to their team. A researcher was appointed to study the performance...
A.
slightly above average
B.
higher than in the 1998 World Cup
C.
quite unexpected
D.
as high as in a standard match