【单选题】
如果1双皮鞋=2件上衣符合等价交换原则，现在生产皮鞋的社会必要劳动时间增加一倍，而生产上衣的社会必要劳动时间减少一半，那么一双皮鞋可以交换到
①
1件上衣
②
4件上衣
③
8件上衣
④
16件上衣
【简答题】
Direction: Fill in the blanks with the words given below. Change the form if necessary.[integrity; conscience; yield; appoint; assure; ensure; demonstrate; clarify; preserve; scarce]8. She is a woman of[填空1]who has never given up her principles for the sake of making money.