0.32kW=_1W 1.5MW=_2kW=_3W 3500W=_4kW．P= Wt 和P=Fv这两个公式的使用是有条件、有区别的：前者是指发生在时间t内的平均功率；而后者，若F和v为定值，则P

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0.32kW=____W 1.5MW=____kW=____W 3500W=____kW．P=

W

t

和P=Fv这两个公式的使用是有条件、有区别的：前者是指发生在时间t内的平均功率；而后者，若F和v为定值，则P为____，若F和v在变化，则P也在____，所以它反映的是即时功率．

上一题下一题 0.0难度选择题更新时间:2020-04-08 09:47:25

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320,1.5×10³,1.5×10⁶,3.5,定值,变化

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Look at this photo. The girl is from Beijing. She is six years old. She is not tall and she has short black hair. She has big eyes, a small nose and a wide mouth. She is in old clothes. Now she is lost（丢失了）. Please help us find her. Our phone number is （010）8699-8886. Thanks!
阅读短文，完成下列表格关于the girl的信息，每个空格一词。

From	____	Looks
Age	Six	She is ____ and she has short ____ hair. Her eyes years are big. She has a ____ nose and a ____mouth.
Tel	（010）8699-8886

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