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

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

admin2011-03-26  70
问题 It is difficult to discern the sample that is on the slide unless the microscope is adjusted properly.
选项 A、overlook
B、disclaim
C、discard
D、detect
答案D
解析
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