题目内容
（请给出正确答案）
A．prove
B．proves
C．have been proved
D．are proved
如果结果不匹配，请 联系老师 获取答案
更多“Economics, several courses of …”相关的问题
A.Workers in the new economy must be more computer literate than they were in the past
B.If the food stamp program is eliminated, the poor will have difficulty feeding their families
C.The elimination of tariffs on imported goods and services has increased unemployment in the United States
D.All of the statements above represent examples of positive economics
E.None of the statements above represent examples of positive economics
80/20 法则背后的经济学原理是范围经济(economics of scale)，指随着某种生产数量规模的扩大，长期平均成本会下降。()
A.Markets
B.Money
C.Profit seeking
D.The price mechanism
E.Scarcity
A.recover
B.appreciate
C.exaggerate
D.address
A.were joined
B.were participated
C.were included
D.were involved
A.Discontinuous chip
B.Discontinuous chip with BUE
C.Continuous chip
D.Continuous chip with BUE
I saw______boys at the park.
A．the both
B．many a
C．both the
D．the several
