This work was done by _________________ (一帮外行）. (a bunch of)
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.
- Will you show me how ( ) A: this work is done B: is this work done
- 我国的名山有哪些帮一帮
- 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
- 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