搜搜做题作业网问个英语问题 The ratio of the work done by the machine
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问个英语问题 The ratio of the work done by the machine
问个英语问题
The ratio of the work done by the machine ________ the work done on it is called the efficiency of the machine.
A) against B) with C) to D) for
问个英语问题
The ratio of the work done by the machine ________ the work done on it is called the efficiency of the machine.
A) against B) with C) to D) for
C) to
to相当于数学中的“比”
句意:一台机器完成工作的量比上该机器所做的工作叫做该机器的工作效率.”
to相当于数学中的“比”
句意:一台机器完成工作的量比上该机器所做的工作叫做该机器的工作效率.”
问个英语问题 The ratio of the work done by the machine
The ratio of the work done by the machine ( C )the work done
most of the farm work is done by machine in China today.
the work is done by
if one pays by the amount of work done and not by the hour.d
the amount of work done by the gas system in increasing the
翻译： The machine can do the work of three people
The machine suddenly stopped(work)----because of the power o
work done to the system和work done by the system的区别
The work done by the man was difficult.The man did the work
Find the ratio of the following:
He insisted that the idea evolve out of work done by British