【单选题】Under conditions of decreasingcost:
A.
Under conditions of decreasingcost: externalities are irrelevant andinapplicable.
B.
afew large ellers may come todominate the industry.
C.
astrong case can be made forsupplanting complete individualismby some kind of group action.
D.
each of firms in the industry will continue to produce more outputat falling costs per unit.
【单选题】螺栓的规定标记 “ 螺栓 GB/T 5782 M10×50” 中, 10 是指
【判断题】若双链 DNA 中的一条链碱基顺序为 CTGGAC ,则另一条链的碱基顺序为 GACCTG 。
【单选题】现代企业基本的促销方式有人员推销、销售促进和
【简答题】Under L/C operations,the bank will effect payment under the following conditions( ).