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【单选题】
由定位副的制造误差和间隙引起定位基准位置的变动产生的定位误差,称为( )。
A.
基准不重合误差
B.
基准位移误差
C.
定位副误差
D.
定位间隙误差
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参考答案:
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【简答题】Sources of excessive greenhouse gases created by humans include driving cars, using 4)_ from coal-fired power plants or heating our homes with oil or natural gases.
【单选题】调酒师在示瓶时,应该用左手托住瓶底,右手扶住瓶颈,呈( )角把商标面向宾客。
A.
30度
B.
60度
C.
90度
D.
45度
【判断题】The second-generation technologies include solar heating, biomass, photovoltaics, wind power, solar thermal power stations, and modern forms of bioenergy.
A.
正确
B.
错误
【单选题】调酒师在示瓶时,应该用左手托住瓶底,右手扶住瓶颈,呈( )角把商标面向宾客。
A.
30°
B.
45°
C.
60°
D.
90°
【单选题】关于胰岛素的叙述,下列哪一项是错误的?( )
A.
是酸性蛋白质
B.
口服无效
C.
对胰岛素依赖型糖尿病有效
D.
皮下注射吸收快
E.
只能从猪、牛胰腺中提取
【判断题】唐玄宗时期国力强盛,疆域辽阔,创造了世界上最发达的文明,史称“开元盛世”。
A.
正确
B.
错误
【判断题】The main use of fossil fuels in ancient socio-cultural life include only three perspectives: production, the heating material, and transportation.
A.
正确
B.
错误
【简答题】Millions die early from air pollution each year. Air pollution costs the global economy more than $5 trillion annually in welfare costs, with the most serious 26 occurring in the developing world. ...
【单选题】In general, the oil mist detectors include a built-in heating unit and a compact plug for electrical connectionThe function of heating unit is to ()
A.
avoid false alarms as a result of condensing water vapor
B.
avoid danger of frost under very cold weather
C.
reduce the viscosity of the crankcase atmosphere in order to improve the fluidity
D.
keep the temperature of the oil mist detectors in an appropriate range
【简答题】1 include thefts and pilferage, contamination, leakage, sweating and heating, taint, fresh/rain water damage and so on.
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