【简答题】按要求改写句子,每空一词。 1. There are eigh floors in my building.( 对画线部分提问) ______ ______ ______ are there in your building? 2. I live in a farmhouse. I t has ten rooms.( 改为同义句) I live in a ______ ______ ten...
【判断题】边际成本与平均成本曲线相交于边际成本曲线的最低点。( )
【简答题】一条正脊四条斜脊,四个斜坡,屋顶面有弧度。这种形式的屋顶叫做 。
【单选题】I live in a two-room flat _____ the outskirts of the city.
【简答题】平均成本曲线与边际成本曲线相交于边际成本曲线的最低点。