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【单选题】
国家确定的中西部省、自治区、直辖市的政府还贷公路收费期限最长不得超过（）。A.
20年
B.
25年
C.
30年
D.
35年
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A.
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B.
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【单选题】What do you know about the Seal of the United States?
A.
lts final version came into being in the 20th century.
B.
Jefferson first began to consider its design in 1774.
C.
It has gone through an even longer path of evolution than Uncle Sam.
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A.
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B.
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