用公式表示)在完全竞争市场上,企业短期均衡的条件是_____________,长期均衡的条件是___________。
参考答案:MR=MC MR=MC=AR=AC
I _______ the early bus because I got up late this morning.
A.failed
B.took
C.caught
D.missed
下列句中"之"不作代词或助词的是()
A.夫何喜怒哀乐、心思嗜欲之汩于中
B.不穷其流,则何以知后世变法之弊
C.然《灵枢》之图,或议其太繁而杂
D.虚则补之,实则泻之
E.吾之心正,则天地之心亦正