(单选题)

What can the paper-based batteries do?

A.Power tiny devices.

B.Lower blood sugar levels.

C.Produce much electricity.

D.Change chemicals in the paper.

参考答案：A

参考解析：

细节理解题。根据第三段第二至三句“What paper-based batteries won’t do is generate much power. They do, however create enough to run small devices in faraway or dangerous places — such as a battlefield.”可知，纸质电池不能产生太多电力。不过，它们的确能够制造出足够多的设备，在遥远或危险的地方(如战场)运行小型设备。所以B项、C项、D项错误。故选A。

知识点：

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