更多“德国经济学家霍夫曼专门对工业结构规律进行研究得出的霍夫曼比率”相关的问题
肺泡内的气体与毛细血管内血液的气体进行交换时，必须经过肺泡上皮、肺泡上皮基膜、血管内皮基膜和内皮细胞等结构组成的薄膜层，此薄膜层称为气--血屏障，也称为（ ）。
《中国共产党党章》明确规定，中国共产党是中国工人阶级的先锋队，同时是( )。
A .
中国人民的先锋队 B .
中华民族的先锋队
C .
中国人民和中华民族的先锋
D . 中国新阶层的先锋队
当零件作无限寿命设计时，它所承受的交变应力值应低于相应材料的（）。
A.抗拉强度
B.屈服强度
C.弹性极限
D.疲劳极限
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（）通过相面发现丈夫不会长命，并做好了当寡妇并独立管理家庭、教育孩子的准备的是谁？
A . A.林氏
B . B.细柳
C . C.乔女
D . D.霍女
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某批产品的生产先后经过加工车间和装配车间，已知加工车间的生产周期为15天，保险期为5天；装配车间的生产周期为2天；十月份装配车间的平均日产量为30件。说明累计编号法适用于何种生产类型企业的作业计划编制。
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215.对颈交感干的描述，不正确的是
A.由颈上、中、下交感神经节及其节间支组成
B.位于颈动脉鞘和椎前筋膜的前方
C.颈上神经节最大，呈梭形，位于第2、3颈椎横突前方
D.颈中神经节最小，有时缺如
E.颈下神经节位于第7颈椎横突与第1肋颈的前方
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关于椎间盘的叙述,正确的是( ).
A. 是连结相邻椎体的重要结构,腰椎间盘最厚 B. 具有承受压力、缓冲震荡的作用 C. 纤维环的后份最薄 D. 以上均正确
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通过短信开通139邮箱免费版应发送什么到10086？（）
A.YX；
B.DZ；
C.ZC；
D.KTYX。
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公司总部基建部负责组织对业主项目部工作进行考核。
A . 正确
B . 错误
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逻辑“异或”运算可以描述为当且仅当a、b两个操作数中只有一个为真时才为真,其它情况均为假。下面能够正确描述逻辑“异或”运算的表达式是( )。
A. a||b B. a&&b C. (a&&b)&&!(a||b) D. (a||b)&&!(a&&b)
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对诊断精神分裂症有重要意义的是：（）
A.自杀
B.原发性忘想
C.失眠
D.少语少动
E.都不是
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一般而言，短期贷款展期期限累计不得超过：()。
A.原贷款期限的一半B.半年C.一年D.原贷款期限
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有机合成原料“三烯”指的是（）
A . 乙烯
B . 丁烯
C . 丙烯
D . 1，3-丁二烯
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Passage Three Thousands of gypsies have been trying to emigrate to Canada and Britain. They say they are fleeing persecution(迫害), but most have found they are not welcome in these countries either. Gypsies have never had a home. Europe has experienced enormous upheavals this century. Wars, revolutions, separations and elections have changed the political map of the continent countless times. And with each change, power has shifted, creating new winners and new losers. But for one group -- the gypsies -- change has always meant losing. With each upheaval, the gypsies have been left worse off than they were before. Yet they have survived to become Europe’s largest minority. Moreover, they have succeeded in preserving their culture and their way of life in the face of genocide (种族灭绝), political persecution and poverty. In other cases where minorities have survived similar persecutions -- like Jews during World War Ⅱ, or blacks in South Africa -- their cause has received international support. By contrast, the gypsies’ success at preserving their culture is not regarded as an achievement at all. Instead, it’ s viewed as proof they are both unwilling and unable to change, and therefore irredeemable (不可救药的). Indeed, in 1993, the president of the Slovak Republic attacked their way of life and said steps should be taken to limit the extension of this socially unacceptable and mentally backward population. If such a thing had been said about any other minority, the political protest would have been enormous But, bemuse the Slovak President was referring to gypsies, there were few complaints, except from a few small organizations who try to protect gypsies’ rights.
A．minorities in EuropeB．political changes in EuropeC．history of gypsiesD．homeless gypsies
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