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驼峰道床比较脏，轨面上经常有油腻、沙子、煤屑和其他物质从车辆上散落下来，经过辗压，形成了导电不良的薄层，，使轨道电路的分路电阻（），分路效应变坏。为此采用了分路灵敏度高的2.3型轨道电路，该制式轨道电路以（）的分流电阻短路轨道电路时，轨道继电器应可靠
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【简答题】下列关于公民住所的说法，不正确的是（ ）。
【简答题】a letter of credit is one of the international payment methods. it can be defined as a written promise of the 1 acting at the request and on the instructions of the 2 to make a payment to the benefici...
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【简答题】Allelomimetic behavior may be defined as behavior in which two or more individual animals do the same thing,with some degree of mutual stimulation and coordination.It can only evolve in species with s...
【简答题】翻译下面句子:Almost equal l y impo r tant is th a t, as the quot a tion indic a tes, Pl a to defined a pa r ticular view of w h a t m a them a tics w as, or should b e .
【简答题】关于自然人和公民，下列说法正确的是（ ）。
【单选题】关于“公民”说法正确的是（ ）
A.
公民就是指全体人民
B.
公民是一个政治概念
C.
公民是一个国家概念
D.
公民是个法律概念，只要取得一个国家的国籍就是这个国家的公民
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