2. 外语
  3. It is difficult to ________ the sample that is on the slide unless the microscope is adjusted properly.

It is difficult to ________ the sample that is on the slide unless the microscope is adjusted properly.

admin2012-05-18  41
问题 It is difficult to ________ the sample that is on the slide unless the microscope is adjusted properly.
选项 A、overlook
B、discern
C、disclaim
D、distract
答案B
解析 本题要分清三个前缀为dis-动词的意义。B．discern辨别，识别，认出；C；disclaim否认，放弃，拒绝；D．distract转移注意力，分散精力。它们在意义上没有共同之处。A．overlook忽略，忽视。B符合题意要求。句意为：如果不把显微镜调试好的话，就很难分辨切片上的样品。
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大学英语六级

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