C) to
to相當(dāng)于數(shù)學(xué)中的“比”
句意:一臺(tái)機(jī)器完成工作的量比上該機(jī)器所做的工作叫做該機(jī)器的工作效率.”
問個(gè)英語問題 The ratio of the work done by the machine
問個(gè)英語問題 The ratio of the work done by the machine
問個(gè)英語問題
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
問個(gè)英語問題
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
英語人氣：115 ℃時(shí)間：2020-02-03 16:58:49
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