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患者男性，31岁。无明显诱因出现皮肤紫癜2周，口腔血疱1周，多次查血小板均减少，白细胞正常，血红蛋白正常，目前血小板为29×109/L。骨髓象显示：骨髓巨核细胞增多，形成血小板的巨核细胞减少。 根据临床特点和骨髓象本患者的诊断是
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A tribe of Plains Indians, the Assiniboins, had the distinction of hunting on foot. During the winter months the hunters wore snowshoes to chase the buffalo into the deep snow, where the animals were easily killed, The Assiniboins were thrifty people who utilized all of their dead prey: the meat was their food; their clothing came from the hides; their tools and weapons came from the bones and horns. Once the other parts had been disposed of, the children used the buffalo’s ribs as sleds. The passage indicates that the Indians chased the buffalo into deep snow so that the buffalo could NOT ______.
钢结构轴心受力构件的强度轴心受拉和轴心受压构件的强度，都以截面应力达到屈服强度为极限。( )
Basic to any understanding of Canada in the 20 years after the Second World War is the country’s impressive population growth. For every three Canadians in 1945, there were over five in 1966. In September 1966 Canada’s population passed the 20 million mark. Most of this surging growth came from natural increase. The depression of the 1930’s and the war had held back marriages, and the catching-up process began after 1945. The baby boom continued through the decade of the 1950’s, producing a population increase of nearly fifteen percent in the five years from 1951 to 1956. This rate of increase had been exceeded only once before in Canada’s history, in the decade before 1911, when the prairies were being settled. Undoubtedly, the good economic conditions of the 1950’s supported a growth in the population, but the expansion also derived from a trend toward earlier marriages and an increase in the average size of families. In 1957 the Canadian birth rate stood at 28 per thousand, one of the highest in the world. After the peak year of 1957, the birth rate in Canada began to decline. It continued falling until in 1966 it stood at the lowest level in 25 years. Partly this decline reflected the low level of births during the depression and the war, but it was also caused by changes in Canadian society. Young people were staying at school longer; more women were working; young married couples were buying automobiles or houses before starting families; rising living standards were cutting down the size of families. It appeared that Canada was once more failing into step with the trend toward smaller families that had occurred all through the Western world since the time to the Industrial Revolution. Although the growth in Canada’s population had slowed down by 1966 (the increase in the first half of the 1960’s was only nine percent), another large population wave was coming over the horizon. It would be compared to the children of the children who were born during the period of the high birth rate prior to 1957. What does the passage mainly discuss
某工程项目经有关部门批准采取公开招标的方式确定了中标单位并签订合同。1．该工程合同条款中部分规定如下：(1)由于设计未完成，承包范围内待实施的工程虽然性质明确，但工程量还难以确定，双方商定拟采用总价合同形式签订施工合同，以减少双方的风险。(2)施工单位按建设单位代表批准的施工组织设计(或施工方案)组织施工，施工单位不承担因此引起的工期延误和费用增加的责任。(3)甲方向施工单位提供场地的工程地质和地下主要管网线路资料，供施工单位参考使用。(4)建设单位不能将工程转包，但允许分包，也允许分包单位将分包的工程再次分包给其他施工单位。2．在施工招标文件中，按工期定额计算，该工程工期为573天。但在施工合同中，双方约定：开工日期为2008年12月15日，竣工日期为2010年7月25日，日历天数为586天。3．在工程实际实施工程中，出现了下列情况：(1)工程进行到第6个月时，国务院有关部门发出通知，指令压缩国家基建投资，要求某些建设项目暂停施工。该工程项目属于指令停工下马项目，因此，业主向承包商提出暂时中止合同实施的通知。承包商按要求暂停施工。(2)复工后的工程后期。工地遭遇当地百年罕见的台风的袭击，工程被迫暂停施工，部分已完工程受损，现场场地遭到破坏，最终使工期拖延了2个月。 本工程的合同工期应为多少天，为什么？
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