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.
举一反三
- the part between the wheels on a car/the part which holds the wheel A: crane B: spare part C: axle D: laser
- The wheel swivel on each end via a pivot arrangement between the axle and the wheel spindle
- We can use special machines to detect ________money.
- Human ingenuity was initially demonstrated in A: the use of machines to produce science fiction. B: the wide use of machines in manufacturing industry. C: the invention of tools for difficult and dangerous work. D: the elite's cunning tackling of dangerous and boring work.
- The plane succeeded in carrying the boy on board with ______ in the air.A. one wheel C. three wheelsB. two wheels D. four wheels A: two wheels B: four wheels C: three wheels D: The plane succeeded in carrying the boy on board with ______ in the air. E: one wheel