题目内容:
Modernsocietiescontrolsupplyanddemand______.
A.bydirectinterventioninthepricingofgoodsandservices B.bymeansofmoneyandthepricemechanism
C.bykeepingawatchfuleyeonrelativepricechanges
D.byfixingpricesinspecificindustries
参考答案:
答案解析: