此工程投标阶段及施工准备阶段可能影响成本的因素有哪些?
We had not suffered much from the war there, though like most children of my age,I was used to seeing bombed houses in the streets and the enormous army lorries passing through.
一个经济原先处于长期的完全竞争状态,对该经济做如下假定:①只有L和K两种生产要素作为投入;②只生产X和Y两种商品,并且X和Y为替代品;③X行业和Y行业都是成本递减行业。那么:
(1)如果对商品X的需求增加,会有哪些影响?
(2)商品Y的市场会发生什么样的变化?