【单选题】()的饮食习惯西域风味浓烈,各种食品色香味俱全。
【单选题】Returns to scale refers to the change in output when
A.
all inputs increase proportionately.
B.
labor increases holding all other inputs fixed.
C.
capital equipment is doubled.
D.
specialization improves.
【判断题】( ) 画幅越大, 画面的成像质量越高。
【判断题】If long-run average total cost is rising, then the firm is experiencing Constant returns to scale.
【多选题】关于画幅
B.
大画幅比小画幅在成像质量上有不可比拟的优越性