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【简答题】

How can we calculate the ( ) speed of the Amazon river ( ) as it passes through the rainforest?

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参考解析:
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举一反三

【单选题】The three different energy investments the group is discussing are ____.

A.
algae, solar energy, and biodiesel
B.
algae, solar energy, and fossil fuels
C.
water power, solar energy, and biodiesel