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测定某旋光性物质的比旋光度时，测量管长度为100mm，样品浓度为45mg·mL-1，旋光度为+4.5°，其对映体的比旋光度为______。
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Part A For questions 1 - 5, you will hear a passage. Listen and answer the questions with the information you’ve heard. Write not more than 3 words in each blank. You will hear the recording twice. You now have 25 seconds to read the questions below. A great crash of ______ occurred in 1929.
案情：甲演出公司与乙服装公司订立合同一份，约定由甲公司提供布料，乙公司为甲公司加工一批服装。完工后，由乙公司送货上门。乙公司完成加工任务后，委托丙运输公司为其送货。两辆送货的卡车在送货途中，遭受雷击。其中一辆卡车幸免，另一辆起火燃烧，车毁人亡。事后，甲演出公司要求乙服装公司补齐其定作的全部服装，并承担迟延交货的责任；乙服装公司则主张甲演出公司依照合同约定支付全部加工费，服装损失则应由丙运输公司承担；而丙运输公司要求乙服装公司支付全部运费，并分担部分汽车损失责任。各方争执不下，纷纷向法院提起诉讼。 问题： 假设各方均未向保险公司投保的情况下： 本案当事人之间存在几种民事法律关系
请在下面代码中加入监听器语句。 importjava.awt.*； importjava.applet.Applet； publicclassSimpleextendsAppleimplementsMouseListener StringBuffer； publicvoidinit() //监听器语句 buffer=newStringBuffer()； addltem(“initializing…”)； publicvoidmoseEntered(MouseEventevent) publicvoidmoseExited(MouseEventevent) publicvoidmosePressed(MouseEventevent) publicvoidmoseReleased(MouseEventevent) publicvoidmoseClicked(MouseEventevent) addltem(“click!…”)；
People in the United States in the nineteenth century were (21) by the (22) that unprecedented change in the nation’s economy would bring social (23) . In the years following 1820, after several decades of relative stability, the economy (24) a period of (25) and extremely rapid growth that continued to the end of the nineteenth century. (26) that growth was a structural change that (27) by increasing economic diversification and a gradual shift in the nation’s labor force from agriculture to manufacturing and other nonagricultural pursuits. Although the birth rate continued to decline from its high level of the eighteenth and early nineteenth centuries, the population roughly doubled every generation during the rest of the nineteenth century. As the population grew, its (28) also changed. Massive waves of immigration brought new ethnic groups into the country. Geographic and social mobility--downward as well as upward-- (29) almost everyone. Local studies (30) that nearly three-quarters of the population in the North and South, the emerging cities of the Northeast, and in the restless rural counties of the West changed their residence each decade. As a (31) , historian David Donald has written, "Social atomization affected every segment of society", and it seemed to many people that "all the recognized values of orderly civilization were gradually being eroded." Rapid industrialization and increased geographic mobility in the nineteenth century had special (32) for women because these changes tended to (33) social distinctions. As the roles men and women played in society became more rigidly defined, so did the roles they played in the home. In the (34) of extreme competitiveness and dizzying social change, the (35) lost many of its earlier functions and the home came to serve as a (36) of tranquillity and order. As the size of families decreased, the roles of husband and wife became more clearly (37) than ever before. In the middle class especially, men participated in the productive economy while women (38) the home and served as the custodians of civility and culture. The intimacy of marriage that was (39) in earlier periods was rent, and a gulf that at times seemed unbridgeable was (40) between husbands and wives.
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