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只存在于多根牙；防止牙根向冠方移动
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In 1959 the (41) American family paid $ 989 (42) a year’ s supply of food. In 1972 the family paid $1 311. That was a price (43) of nearly one-third. Every family has (44) this sort of experience. Everyone agrees that the cost of (45) a family has risen sharply. But there is less agreement (46) reasons for the rise are being discussed. Who is really (47) Many blame the farmers who (48) the vegetables, fruit, meat, eggs and cheese (49) stores offer for (50) . According to the U.S. Department of (51) , the farmer’s share of the $ 1 311 spent by the family in 1972 was $ 521. This was thirty-one percent (52) than the farmer had received in 1959. But farmers claim that this increase was very small (53) to the increase in their cost of (54) . Farmers tend to blame others for the sharp (55) in food prices. They particularly blame those who (56) the farm products after the products leave the farm. These (57) truck drives, meat packers, manufacturers of packages and other food containers, and the (58) of stores where food is sold. They are among the "middlemen" who stand (59) the farmer and the people who buy and eat the food. (60) middlemen the ones to blame for food price
In 1959 the (41) American family paid $ 989 (42) a year’ s supply of food. In 1972 the family paid $1 311. That was a price (43) of nearly one-third. Every family has (44) this sort of experience. Everyone agrees that the cost of (45) a family has risen sharply. But there is less agreement (46) reasons for the rise are being discussed. Who is really (47) Many blame the farmers who (48) the vegetables, fruit, meat, eggs and cheese (49) stores offer for (50) . According to the U.S. Department of (51) , the farmer’s share of the $ 1 311 spent by the family in 1972 was $ 521. This was thirty-one percent (52) than the farmer had received in 1959. But farmers claim that this increase was very small (53) to the increase in their cost of (54) . Farmers tend to blame others for the sharp (55) in food prices. They particularly blame those who (56) the farm products after the products leave the farm. These (57) truck drives, meat packers, manufacturers of packages and other food containers, and the (58) of stores where food is sold. They are among the "middlemen" who stand (59) the farmer and the people who buy and eat the food. (60) middlemen the ones to blame for food price
直链淀粉含量多的淀粉糊化后，黏性大，直立性强。( )
某商贸中心位于市中心繁华地带，周围是以商业、服务业为主体，以文化、教育、卫生和旅游事业为支柱的区域。已建成的一期工程用地面积约10万m2。工程内容包括饭店、写字楼、公寓、会议厅、商场、行政楼和停车库等，总建筑面积50万m2。现拟建二期工程，位于已建成的一期工程东侧，建设内容包括2栋公寓、1栋写字楼、1栋饭店和1栋商场，地下二三层为大型停车场。二期总占地面积8万m2，建筑用地面积66721m2，新征用地面积56000m2。二期工程建成后与一期工程相连构成一个集办公、酒店、商业、餐饮、娱乐、服务于一体的多功能建筑群。 商贸中心二期工程选址区东侧为交通干道；北侧隔马路是一个小学，小学北侧为一风景名胜古迹，是省级文物保护单位；南侧为一高级写字楼。周围100m范围内建筑物最高为50m。项目周围水电设施齐全，供暖在一期工程已建成的锅炉房基础上进行扩建，锅炉为天然气锅炉，现有烟囱高度为45m，制冷采用中央空调系统。 运营期的主要环境影响是什么
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