单项选择题

A．neither
B．nor
C．or
D．and
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单项选择题
A．abundantB．adequateC．scarceD．expensive
A．abundant
B．adequate
C．scarce
D．expensive
单项选择题
A．typicallyB．especiallyC．specificallyD．essentially
A．typically
B．especially
C．specifically
D．essentially
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