题目内容:
Whyisitdifficulttoexplaintheonsetofeconomicdecline? A.Becausenoeconomistknowseverything
B.Becauseitalwaysfollowsaperiodofprosperity
C.Becausetherearetoomanyreasonsbehindit
D.Becauseitishardtopredictwhenitwillbecoming
参考答案:【答案仅供学习,请勿对照自行用药等】
答案解析: