They asked 74 university students to take a timed, easy general-knowledge quiz which they were asked to finish as quickly as possible without compromising accuracy.
在保证正确率的基础上,他们要求74名大学生尽快完成一份计时的、一般知识测验。
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CBN is an ideal tool material for finish and semi_finish turning powder superalloy. It not only ensures the high machining accuracy, but also can obtain longer tool life.