[单选题]A laser beam ________ on a single cell, on part of a cell, or even individual atoms and molecules.
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2023-10-01 08:00:14
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[单选题]A laser beam ________ on a single cell, on part of a cell, or even individual atoms and molecules.

A.makes enough narrow focus
B.is made enough narrow to focus
C.can be made narrow enough to focus
D.may be made enough narrow to focus
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