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【单选题】
气体灭火浓度是指在101KPa 大气压和规定的温度条件下,扑灭某种火灾所需的灭火剂在空气中的最小( )A.
质量用量
B.
体积用量
C.
质量百分比
D.
体积百分比
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举一反三
【单选题】The amount of value a firm creates is measured by the(). 一个公司创造的价值是由( )指标来衡量的。
A.
economies of scale they are able to achieve.能够实现规模经济。
B.
difference between its costs of production and the value that consumers perceive in its products.其生产成本与消费者对其产品的感知价值之间的差异。
C.
profitability the firm achieves.公司实现盈利。
D.
difference between its costs of production and the price that it charges for its products.生产成本与产品价格之间的差额。
【判断题】The amount of value a firm creates is measured by the difference between its costs of production and the price that it charges for its products.
A.
正确
B.
错误
【单选题】下列关于血液基本功能的叙述,错误的是:
A.
血液具有运输功能
B.
血液具有调节内环境稳态的功能
C.
血液具有防御功能
D.
血液具有免疫功能
E.
血液不具备缓冲体温的作用
【单选题】The amount of value a firm creates is measured by the:
A.
economies of scale they are able to achieve.
B.
difference between its costs of production and the value that consumers perceive in its products.
C.
profitability the firm achieves.
D.
difference between its costs of production and the price that it charges for its products.
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