举一反三
- 电动机的额定功率是指（ ） A: 输出的机械功率 output mechanical power B: 输入的机械功率input mechanical power C: 输入的电功率input electric power D: 输出的电功率output electric power
- Water wheels are machines that use the energy of ______ to turn a wheel. The axle of the turning wheel can then power other machines to do work.
- The temperature ____ which machines work normally is 28°C.
- The ethical and moral problems caused by intelligent machines and robots may be contrary to human moral concepts, so we should stop developing intelligent machines.
- Heat energy and energy are the middle processes of energy transformation in an electric power plant. (chemical / mechanical)
内容
- 0
供电组件能够提供28V直流电。 A: The power unit can supply 28 VD B: The power unit is capable of producing 28 VD C: The power unit may supply 28 VD D: The power unit would supply 28 VD
- 1
In a world in which hunger remains prevalent, machines and organizations hold the key to producing more food and distributing it equitably. A: rampant B: disorderly C: trendy D: conventional
- 2
细菌在合成肽聚糖是所执行的是____。? mechanical work 机械功|transport work 转运功|chemical work化学功|所有选项均正确
- 3
Ways to produce hydrogen fuel include producing it from nuclear power, biomass, algae, artificial photosynthesis, direct solar and coal gasification.
- 4
词汇与结构 The complexity and weight of mechanical flight control systems increase considerably with the size and performance of the aircraft. Hydraulic power _________ these limitations.