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What special tasks were not the first dogs bred for()
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Shortly after the war, my brother and I were invited to spend a few days with an uncle who had just returned from abroad. He had rented a cottage in the country, although he rarely spent much time there. We understood the reason for this after our arrival: the cottage had no comfortable furniture in it, many of the windows were broken and the roof leaked, making the whole house damp.On our first evening, we sat around the fire after supper listening to the stories which our uncle had to tell of his many adventures in distant countries. I was so tired after the long train journey that I would have preferred to go to bed ; but I could not bear to miss any of my uncle’s exciting tales.He was just in the middle of describing a rather terrifying experience he had once had when there was a loud crash from the bedroom above, the one where my brother and I were going to sleep."It sounds as if the roof has fallen in! "exclaimed my uncle, with a loud laugh.When we got to the top of the stairs and opened the bedroom door, we could see nothing at first because of the thick clouds of dust which filled the room. When the dust began to clear, a strange sight met our eyes. A large part of the ceiling had collapsed, falling right onto the pillow of my bed. I was glad that I had stayed up late to listen to my uncle’s stories, otherwise I should certainly have been seriously injured, perhaps killed.That night we all slept on the floor to the sitting room downstairs, not wishing to risk our lives by sleeping under a roof which might at any moment collapse on our heads. We left for London the very next morning and my uncle gave up his cottage in the country. This was not the kind of adventure he cared for either! When they opened the bedroom door, they could see nothing at first because （）
甲状旁腺激素对肾发挥的作用是通过
成年后生长素分泌过多会导致（）
甲公司是一家网络销售公司，集销售、网页设计、快递于一体，其销售的物品包括：家电、衣服、读物、户外用品等各种领域的商品。现在的网络销售主要被三家公司垄断：乙公司、丙公司和丁公司。其次还有其他一些网上销售公司，以上列出的这些公司都比甲公司的资金雄厚、资源丰富。2010年甲公司的销售收入为200万元人民币，而乙公司是3000万元人民币，丙公司是2300万元人民币，网络市场已经被认为是一个成熟的市场。但是，一部分细分市场却快速的膨胀，除了整个行业增长的原因之外，还有高度的专业化、技术革新和吸引人的网页设计和服务等原因。 要求：请根据上述资料，简述甲公司应当采取哪种竞争战略会产生哪些风险
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