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【单选题】
下列关于工资率上升对个人劳动力供给产生收入效应和替代效应的说法中，正确的是()。A.
当收入效应大于替代效应时，劳动力供给时间减少
B.
当收入效应小于替代效应时，劳动力供给时间减少
C.
收入效应和替代效应同时存在
D.
收入效应可以使劳动者获得休闲时间
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【单选题】Transgenic mammals that secrete monoclonals in their milk can generate one gram of antibody for roughly $100—one third the price of traditional production methods, most scientists agree, but still too...
A.
revolutionary
B.
efficient
C.
cost-effective
D.
regarded
E.
feasible
【单选题】Definition of M onoclonal Antibod ies
A.
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 .
【单选题】Definition of M onoclonal Antibod ies
A.
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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