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【单选题】
________利用细胞各部分折射率和厚度不同，光线通过后光波的相位发生改变，通过环状光阑和相差板，利用光的干涉将相位差变振幅差。A.
明视野显微镜
B.
暗视野显微镜
C.
相差显微镜
D.
荧光显微镜
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【单选题】It is (1) matter of common experience that one can describe (2) position of (3) point in space by three numbers, or coordinates. For example, one can say that (4) point in (5) room is two meters from ...
A.
(1)a (2)the (3)a (4)a (5)a (6)a (7)the
B.
(1)the (2)the (3)a (4)the (5)a (6)a (7)the
C.
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A.
better than
B.
other than
C.
rather than
D.
more than
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