单选题：The writer has mentioned all the following benefits of hitch

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The writer has mentioned all the following benefits of hitchhiking EXCEPT A．promoting mutual respect between stranger
B．increasing one's confidence in stranger
C．protecting environmen
D．enriching one's knowledg

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All the President's Men __________ one of the important book

All the President's Men __________ one of the important books for historians who

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回答第48空。

回答第48空。A．Once again B．Repeatedly C．Unusually D．Unexpectedly

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回答第47空。

回答第47空。A．Naturally B．Instead C．Consequently D．Still

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663345（　　）

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表中所示的省市中，企业自筹资金占污染治理投资总额比重最高的省市是（　　）。

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