The contradiction that arose at the Constitutional Conference of 1787 was contradiction between______.
A. big states and small states
B. industrial-commercial interests and landed interests
C. one house or two houses for Congress
D. both A and B
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4M3电铲中心轴的作用是使转台对机座起到定心与连接作用。()
不论简单还是复杂的液压系统基本上都由二部分组成。()
根据轨道杂化理论,烯烃的双键是由下列哪种轨道杂化而成的
A. sp
B. Sp2
C. sp3
D. d
E. spd
《中国药典》采用哪种方法检查地西泮片和地西泮注射液中的哪种有关物质
A. 高效液相色谱法,2一甲氨基-5-氯二苯酮
B. 高效液相色谱法,氯二苯胺
C. 薄层色谱法,2一甲氨基-5-氯二苯酮
D. 薄层色谱法,氯二苯胺
E. 分光光度法,2一甲氨基-5-氯二苯酮