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【单选题】
太阳能热水器集热板与地面的夹角可调节。为使集热效率达到最高,应保持正午太阳光与集热板垂直,若当地的正午太阳高度为H,则集热板与地面的夹角应为90°-H,如下图所示。 同一时间,为使集热效率达到最高,集热板和地面夹角最大的城市是( )A.
北京
B.
上海
C.
郑州
D.
哈尔滨
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反馈参考答案：
举一反三
【判断题】The words and structures of a commentary should be exact and accurate so as to give the audience a clear picture of the event.
A.
正确
B.
错误
【判断题】Among the language contents, new vocabulary and structures often receive more attention from both the teacher and the students. So all new words and structures in a lesson are equally important and th...
A.
正确
B.
错误
【判断题】The faithfulness of interpretation means the correspondence between the words and structures of the two languages.
A.
正确
B.
错误
【简答题】Match the words and structures with their meanings
【判断题】Among the language contents, new vocabulary and structures often receive more attention from both the teacher and the students. So all new words and structures in a lesson are equally important and th...
A.
正确
B.
错误
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