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CRH1A型动车组当蓄电池电压低于()时,将不能通过主控钥匙激活动车组。
几台设备的接零线(或接地线)应采用()方式
对于羊水,下列哪项恰当()
构成视紫红质的维生素A活性形式是()。
下列关于我国调制立法权的说法,正确的是()
包装材料的选择,不仅影口向包装成本,而且还影响商品的_____。
咽结合膜热的病原体为()
某耙吸挖泥船用5000m3舱容挖抛施工,运距20km,挖泥时间50min,重载航速9kn,轻载航速11kn,抛泥及掉头l0min,泥舱载重量7500t,疏浚土密度1.85t/m3,海水密度1.025t/m3,试计算: (1)泥舱的载泥量; (2)该船的生产率; (3)试述耙吸挖泥船的主要技术性能及优缺点。
社会管理是指国家通过制定一系列社会政策和法律规范,()。
彩票兑奖有哪些规定?
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