举一反三
- For a system, suppose it adsorb 100 kJ of heat from the surroundings and do 50 kJ of work to the surroundings, how much is its internal energy change? A: +150kJ B: -150 kJ C: 50 kJ D: -50 kJ
- A gas system absorbs 200J of heat and simultaneously does 300J work on surroundings at a given temperature, what is △U in joules for the gas system? A: +100 B: -200 C: +200 D: -100
- What does the autopilot system include?? Hydraulic system|Mechanical system|Electrical system|All of above
- The major components of automobile electrical system include starting system, charging system, ignition system and accessory system.
- In a feedback system, outputs from the system affect future activities of the system
内容
- 0
If surroundings do work on the system, its W is ( ) A: Greater than 0 B: Less than 0 C: Equal to 0 D: Cannot be determined
- 1
在C#中，引用命名空间System的正确语句是（）。 A: using System B: # import 〈System〉 C: uses System D: # include 〈System〉
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For a system of an ideal gas, in which process of the following that the heat absorbed by the system and the work done toward the surroundings are positive? A: Isochoric (等体) and pressure decreasing process. B: Isothermal (等温) and expanding process. C: Adiabatic and expanding process. D: Isobaric (等压) and compressed process
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The international systems on measures and weights do NOT include（ ）. A: the Metric system B: the German system C: the British system D: theU.S.system
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In the Western thinking, body and surroundings are distinctively separated, reflecting the _______________.