20世纪70年代出现的()理论,解释了同一部门之间的相互贸易的原因和规模。
A.产品生命周期说
B.绝对成本学说
C.产业内贸易学说
D.需求偏好相似学说
参考答案:C
.
.Tim was late again, ______stayed up last night ,he would have come here earlier.
A If he didn’t B Did he not C Had he not D If had he not
清洁提单