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【单选题】
Definition of Resolution / Resolving PowerA.
It is based on the observation that two single-stranded nucleic acid molecules of complementary base sequence can form a double stranded hybrid.
B.
Technique whereby two different types of cells (from one organism or from different species) are joined to produce one cell with one, continuous plasma membrane .
C.
T he specimen is illuminated by a finely focused laser beam that rapidly scans across the specimen at a single depth, thus illuminating only a thin plane (or “optical section”) within the specimen .
D.
The smallest distance between two points on a specimen that can still be distinguished as two separate entities .
E.
They are made by identical immune cells from a unique parent cell .
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【单选题】听力原文：W: Welcome to our program, Tom. M: Thank you. W: Tom, how long have you been a police officer? M: I've been a police officer for forty years. W: Forty years. And you've had. different types of as...
A.
Friends.
B.
A police officer and an investigator.
C.
Two police officers.
D.
A police officer and a program hostess.
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