太阳能热水器是开发利用太阳能的常见装置，为了充分利用太阳能，

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更新 2022-09-03
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太阳能热水器是开发利用太阳能的常见装置，为了充分利用太阳能，太阳能热水器的集热板应该尽可能与正午太阳光线垂直，因此，上海（31°N）的太阳能热水器，在冬至日时，其集热板与地面的夹角最好调整为（）

A．23.5°左右

B．31°左右

C．54.5°左右

D．59°左右

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