单项选择题

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

A．overlook
B．discern
C．disclaim
D．distract
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单项选择题
He accomplished the task ________ of anybody's help.
A．irrelevantly
B．indistinctly
C．separately
D．independently
单项选择题
His personal belongs make it possible for him to move from place to place ________.
A．in ease
B．at ease
C．with ease
D．with easiness
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