The efficiency of the machines has been more than trebled.译文:这些机器的效率已经提高了() 倍多。 (请大家填写数字即可。)
The efficiency of the machines has been more than trebled.译文:这些机器的效率已经提高了() 倍多。 (请大家填写数字即可。)
正确答案:2
The efficiency of the machines has been more than trebled.译文:这些机器的效率已经提高了() 倍多。 (请大家填写数字即可。)
正确答案:2
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