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【单选题】
Most economists prefer corrective taxes to regulation tocorrect the pollution problem because:A.
the market-based solution is less costly to society.
B.
the market-based solution can result in a greater reduction in pollution.
C.
the market-based solution raises revenue for the government.
D.
all of the above.
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【单选题】Five score years ago, a great American, ______ symbolic shadow we stand, signed the Emancipation Proclamation.
A.
with his
B.
in whose
C.
by him
D.
of whom