当铁路从一条线进入另一条线时要设道岔,接触网有道岔的地方也要设()。

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问题:

当铁路从一条线进入另一条线时要设道岔,接触网有道岔的地方也要设()。

考点:高铁岗位考试高速铁路知识高速铁路知识题库
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The effect of the baby boom on the schools helped to make possible a shift in thinking about the role of public education in the 1920’s. In the 1920’s, but especially (1) the Depression of the 1930’s, the United States experienced a (2) birth rate. Then with the prosperity (3) on by the Second World War and the economic boom that followed it, young people married and (4) households earlier and began to (5) larger families than had their (6) during the Depression. Birth rates rose to 102 per thousand in 1946, 106.2 in 1950, and 118 in 1955. (7) economics was probably the most important (8) , it is not the only explanation for the baby boom. The increased value placed (9) the idea of the family also helps to (10) this rise in birth rates. The baby boomers began streaming (11) the first grade by the mid-1940’s and became a (12) by 1950. The public school system suddenly found itself (13) The wartime economy meant that few new schools were buih between 1940 and 1945. (14) , large numbers of teachers left their profession during that period for better-paying jobs elsewhere.

(15) , in the 1950’s, the baby boom hit an antiquated and inadequate school system. Consequently, the custodial rhetoric of the 1930’s no longer made (16) ; keeping youths ages sixteen and older out of the labor market by keeping them in school could no longer be a high (17) for an institution unable to find space and staff to teach younger children. With the baby boom, the focus of educators (18) turned toward the lower grades and back to basic academic skills and (19) . The system no longer had much (20) in offering nontraditional, new, and extra services to older youths.

15().

A. Nevertheless

B. Therefore

C. Furthermore

D. Hence fore

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水晶石浮雕的透雕叫什么?又叫什么?其含义是什么?特点是什么?

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小欣在学习了力的知识后,为了探究拔河比赛取胜的“奥秘”,做了如图所示的实验,第一次比赛小欣和小丽都站在水平地面上,两人相持不动,弹簧测力计的示数如图甲,第二次比赛小丽站在滑板车上,小欣站在地面上,小欣轻而易举的把小丽拉了过来,弹簧测力计的示数如图乙,请你帮小欣分析下列问题:

①第二次小欣拉绳子的力______(填“大于”或“小于”或“等于”)小丽拉绳子的力;

②为什么第二次小欣拉绳子的力比第一次变小了反而还赢了比赛?______;

③拔河比赛取胜的“奥秘”是什么?______;

④为了在校运动会上获得拔河比赛的冠军,请你为班级的拔河队提出至少两种合理化的建议,并说明其中的道理.

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首次支取住宅维修或专项维修应提交下列()资料。

A、加盖业主大会公章和业委会正、副主任签章的业主大会或业主代表大会决议

B、业主委员会决议或经业主委员会认可的急修报告

C、已签订的施工承包合同

D、加盖业主大会公章和业委会正、副主任签章以及物业服务企业公章的支取汇总表

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初次再结晶

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