单项选择题

America has now adopted more ______ European-style inspection systems, and the incidence of food poisoning is falling.

A．solemn
B．rigorous
C．discrete
D．autonomous
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单项选择题
Because of the ______ of its ideas, the book was in wide circulation both at home and abroad.
A．originality
B．ambiguity
C．subjectivity
D．generality
单项选择题
The panda is an endangered species, which means that it is very likely to become ______ without adequate protection.
A．insane
B．exempt
C．intact
D．extinct
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