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自考《英语(一)》试题练习:填句补文(2.9)

2018年02月09日    来源:自考365   字体:   打印

  单选题

  【填句补文】Gang Xiao and Ben Schrag at Brown University, visualize the current by measuring subtle(细微的) changes in the magnetic field of an object and ________.

  A、to shrink it to the size of a desktop computer

  B、to make it capable of measuring very weak changes in magnetic fields

  C、as well as revealing microscopic defects in anything from aircraft to banknotes

  D、converting the information into a color picture showing the density of current at each point

  
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