题目内容
奇函数的代数和仍为奇函数；偶函数的代数和仍为偶函数。
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偶数个奇（或偶）函数的积为偶函数。
任一定义在区间(-a,a)(a>0)上的函数可以表示成一个奇函数和偶函数的和
A.Please complete the possible solutions to ocean trash mentioned in the reading A.Cesar Harada:cleaning up ocean trash using a(n) 1__________Pharrell Williams:2__________ plastic trash into clothes and making people 3_________ of the problem
B.What other things could people do to help reduce the problem? Please share your own ideas.
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