[audioFiles]2017m5s/audio_ezfj_101_201705[/audioFiles] The Solar Water Heate

游客2023-10-30  5

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答案     The Solar Water Heater
    Solar water heaters are used around the world and are not very difficult to build. / There are two parts to the solar water heater. / One part is made of a sheet of metal painted black. / Black surfaces become hotter in the sun than surfaces painted any other color. / The second part of the solar water heater holds the water for the system. / This storage tank can be a container that holds about one hundred liters. / Two rubber pipes are attached to the water storage tank. / One pipe lets water flow into the system. / The other lets water flow out. /

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