【单选题】Edward Snowden’s revelations about the inner workings of the National Security Agency demonstrate how in the era of transparency, a single whistleb lower or mole can disrupt a massive organization.
A.
a small burrowing insectivorous mammal with dark velvety fur, a long muzzle, and very small eyes
B.
someone within an organization who anonymously betrays confi dential information
C.
a small, often slightly raised blemish on the skin made dark by a high concentration of melanin
D.
a large solid structure on a shore serving as a pier, breakwater, or causeway
【简答题】某工厂对某产品的产量与单位成本的资料分析后有如下数据: 月 份 1 2 3 4 5 6 产量x千件 2 3 4 3 4 5 甲单位成本y元/件 73 72 71 73 69 68 乙单位成本y元/件 78 74 70 72 66 60 (1)试比较甲乙哪个单位的成本比较稳定. (2)求甲单位成本y与月产量x之间的线性回归方程.(其中已计算得:x 1 y 1 +x 2 y 2 +…x 6 y...
【单选题】间壁式换热器的总传热传热速率 = 总传热系数×传热面积×传热推动力,其中传热推动力是指
【单选题】在换热器中,间壁任一侧的对流传热速率 = 推动力 / 阻力,其中推动力是指( )
A.
冷流体进出口温度差( T 1 -T 2 ) ;
C.
热流体进出口温度差( T 2 -T 1 ) ;
D.
流体主体温度和管壁温度差( T – Tw W )或( T w – T ˊ)
【单选题】Why does the teacher mention Edward Snowden?
A.
To show he is a lawbreaker
B.
To warn public numerous surveillance programs have been run by NSA
C.
To disclose a unknown fact
D.
To give an example of “whistle blower
【单选题】《关于发布800/900MHz频段射频识别(RFID)技术应用试行规定的通知》规定了中国UHF RFID技术的试用频率为( )。
【单选题】Then NSA contractor Edward Snowden managed to download thousands of secret files from a server in Hawaii.
A.
a person or thing that provides a service or commodity
B.
a computer or computer program which manages access to a centralized resource or service in a network
C.
the player who serves in tennis and other racket sports
【简答题】The fact that he introduced so many______________ upon his appointment did not make him very popular with staff.
【单选题】对流传热速率 = 对流传热系数×传热面积×传热推动力,其中传热推动力是指
【单选题】The drink Ann chose was __________.