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【判断题】
内燃机冷却系统,水箱可以添加矿泉水。
A.
正确
B.
错误
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参考解析:
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皮皮学刷刷变学霸
举一反三
【单选题】我国专业化营销调研公司在什么时间相继成立?
A.
上个世纪80年代
B.
上个世纪90年代
C.
本世纪初
D.
本世纪10年代
【单选题】The existence of external economies of scale _______.
A.
tends to result in large profits for each firm.
B.
may be associated with a perfectly competitive industry.
C.
cannot be associated with a perfectly competitive industry.
D.
tends to result in one huge monopoly.
【单选题】以下哪项不是经口气管插管术的适应证()
A.
上呼吸道梗阻
B.
气道分泌物潴留
C.
气道保护机制受损
D.
颈椎损伤
E.
机械通气
【单选题】External economies of scale ( )
A.
may be associated with a perfectly competitive industry.
B.
cannot be associated with a perfectly competitive industry.
C.
tends to result in one huge monopoly.
D.
tends to result in large profits for each firm.
【单选题】下列哪一项不是气管插管术的适应证( )
A.
舌根后坠致呼吸困难
B.
呼吸肌麻痹
C.
颅脑疾患致呼吸困难
D.
溺水致呼吸骤停
E.
需全麻手术者
【单选题】The existence of external economies of scale
A.
focuses more on individual firms than the industry as a whole.
B.
tends to result in one huge monopoly.
C.
tends to result in large profits for each firm.
D.
cannot be associated with a perfectly competitive industry.
E.
may be associated with a perfectly competitive industry.
【简答题】外部规模经济(external economies of scale)
【单选题】介导细胞免疫应答的主要细胞是( )
A.
B细胞
B.
NK细胞
C.
T细胞
D.
巨噬细胞
【单选题】下列哪项不是气管插管术的适应证
A.
呼衰
B.
心跳呼吸骤停
C.
喉头水肿
D.
昏迷患者咳嗽反射消失
E.
呼吸道分泌物过多
【简答题】设微分方程通解为y=C 1 +lnC 2 x,试讨论怎样给定初始条件,可得唯一特解,以及特解的定义域.
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