在一般情况下,厂商得到的价格若低于()就停止营业。
A、平均成本;
B、平均可变成本;
C、边际成本;
D、平均固定成本。
参考答案:B
腹腔、盆腔手术后或有炎症病人,应采取()卧位,使腹腔渗出物(),促使感染局限性,可减少炎症的扩散和毒素的吸收并减少()。
25.Children often form some bad habits, ____________remain with them as ling as they live.
A.some of them
B.some of which
C.any of them
D.any of which