The ratio of the work done by the machine ______ the work done on it is called efficiency of the machine.
A: against
B: to
C: with
D: for
A: against
B: to
C: with
D: for
B
举一反三
- The ratio of the work done by the machine _________ the work done on it is called the efficiency of the machine.
- The ratio of the work ______ by the machine to the work _____ on it is called the efficiency of the machine. A: to do ...to do B: doing....doing C: having done ... having done D: done ...done
- I ___________________ (印象深刻) the efficiency of the work done in the company.
- Will you show me how ( ) A: this work is done B: is this work done
- With the work _________________, they went out to play. A: doing B: be done C: done D: being done
内容
- 0
It’s not a good habit to leave your work __________ . A: done half B: half done C: a half done D: done a half
- 1
With the work , they went out to play. A: to B: workbeing done C: done D: to play
- 2
The work（）by the time you get there. A: Awill have been done B: Bwas done C: Chad been done D: Dhas done
- 3
DU = 100 J is for a system that gives off 100 J of heat and ( ) A: does no work B: does 200 J of work C: has 100 J of work done on it D: has 200 J of work done on it.
- 4
Given more attention, the work（） A: had been better done B: will be done better C: was better done D: could have been better done