航空货运单作为法律依据的有效期为()。
A.一年
B.两年
C.三年
D.五年
参考答案:B
When I was at college I ______ three foreign languages, but I ______ all except a few words of each.[ ]
A.spoke; had forgotten
B.spoke; have forgotten
C.had spoken; had forgotten
D.had spoken; have forgotten
七十多年前,面对空前严重的经济危机,美国总统罗斯福实行新政,其政策措施中有利于鼓励和刺激国人消费的有
①实行美元贬值 ②商品上贴“蓝鹰”标志 ③实行“以工代赈” ④发放紧急救济金 [ ]
A.①②③④
B.①②③
C.①③④
D.②③④