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2017年卫生职称英语考试每日一练:词汇选项(6月17日)

2016-06-17 12:09 来源:医学教育网

网校职称英语每日一练免费在线测试系统将为所有学员免费提供练习题,所有学员登录成功之后即可免费练习。如有疑问可以到答疑板与专家进行交流,24小时之内即可得到满意答复。欢迎大家积极参与!

词汇选项

When Nick Holonyak set out to create a new kind of visible lighting using semiconductor alloys, his colleagues thought he was unrealistic. Today, his discovery of light-emitting diodes, or LEDs, are used in everything from DVDs to alarm clocks to airports.

Q: Holonyak‘s colleagues thought he would fail in his research on LEDs at the time when he started it.

  A.Right

  B.Wrong

  C.Not mentioned

  

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