单选题：According to the article,, resources such as wind __

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According to the article,, resources such as wind __ A．are sustainable but not replaceable
B．are renewable so sustainable
C．are sustainable so renewable
D．are irreplaceable

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根据材料，回答题。Renewable Energy SourcesToday petroleum provides around 40% of the w

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According to the constitution of Singapore, the president of

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There is an abundant supply of salt in the market.

There is an abundant supply of salt in the market.A．steady B．plentiful C．extra

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