某校学生在学习活动中设计了太阳能热水器如图为了使太阳能热水器有最好的效果需要经常调节�动支架使正午太阳光线直射集热板如果把该热水器放 Template




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tomski某校学生在学习活动中设计了太阳能热水器如图为了使太阳能热水器有最好的效果需要经常调节�动支架使正午太阳光线直射集热板如果把该热水器放 coloring