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【简答题】
设 是非方程组 的一个解, 为 的基础解系,证明: 线性无关.
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【简答题】一批鞋油急需套现,众人皆无良方。老贺灵机一动,计上心来。他先进了一批廉价的雨伞,然后推出 “ 高级鞋油试用价五元,买两盒送一把雨伞 ” 的促销活动。结果,热销一空且获利颇丰。(雨伞在当地零售价长期稳定在 10 元,其批发价仅为 4 元,一盒鞋油成本为 5 角钱。) 试分析该案例说明了怎样的消费者购买行为问题?
【简答题】案例分析题: 一批鞋油急需套现,众人皆无良方,老贺灵机一动,计上心来,他先进了一批廉价的雨伞,然后推出“高级鞋油试用价五元,买两盒送一把雨伞”的促销活动。结果,鞋油一销而空且获利颇丰。(雨伞在当地销售价长期稳定在10元,其批发价仅为4元,一盒鞋油的成本价为5角钱) 请分析: 1. 老贺抓住了人们什么样的心理? 2. 如果你是老贺,还会采用什么方法来销售这批鞋油。
【简答题】The pioneer type was the characteristic one at the turn of the seenth century and also fit the beginning of the______(twenty)century，but it is much less evident today.
【单选题】One type of person that is common in every country is the one who ______.
A.
tries to accept what is offered
B.
always tries to do as much as he possibly can
C.
tries to get as little as he can
D.
tries to do as little as he possibly can and to get as much in return as he can
【简答题】弹簧减振装置按其作用不同分为: , , 。
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