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穿越轨底的各种物件,距轨底的净距离应大于30MM。()
肝素的抗凝血作用机制是( )。
当桥接收的分组的目的MAC地址在桥的映射表中没有对应的表项时,采取的策略是()
某制造厂生产A123产品,各车间的批量、生产周期及生产间隔期如表所示,装配与机械加工车间之间保险期规定为2天,机械加工与锻造车间之间保险期规定为3天。试求各车间投入与出产提前期。
空间的()使得多个权利主体可以分割使用同一地表上下的空间,使空间使用权可以从土地所有权和使用权中分离出来,由非土地所有权人、使用权人享有。
206WP型转向架采用()轴箱定位装置。
用40Gy以上的吸收剂量即可抑制发芽。低剂量与200Gy、400Gy、600Gy较高剂量抑制发芽效果(),但用较高辐照剂量可有效地减小重量的损失。
有关白喉的临床表现下述哪项是错误的()
下列关于中华人民共和国主席的说法正确的是()
教学过程阶段的中心环节是____。
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