单项选择题

把正、负极板各一片浸入电解液中，可获得几伏的电势？
A. 1V B. 1.5V C. 2V D. 3V

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不定项选择
电磁干扰按传播途径可以分成传导干扰和辐射干扰两类。
A．错误
B．正确
单项选择题
In the US, the parents would educate their kids by using the following methods: learning bicycle repair rather than taking a bike to a mechanic's shop; sewing clothing rather than buying new clothes and saving recyclable materials.________
A．对
B．错
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