The beaker should be cleaned before it is used. 用动名词短语取代时间从句或简化时间陈述句,应为:The beaker should be cleaned before it used. ( )
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In 1924, de Broglie, who believed in a unified creation of universe, introduced the idea that electrons should also possess wave properties. 句子中使用who,that引出定语从句。( )
翻译过程中通常采用哪两种翻译方法 ( )
A. 直译法和意译法;B 词译法和段译法;C 通译法和全译法;D 抽象法和直观法
下列不属于Advanced imaging techniques at nano scale的表征设备是( )
A. TEM
B. AFM
C. Light microscopy
科技论文按写作目的分为学术论文和( )论文。
A. 报道
B. 会议
C. 学位
D. 研究