44 What is implied in this passage?
(A) Pesticide DDT is one kind of POPs.
(B) Flame retardant is one kind of organic pollutant.
(C) A lot of efforts have been made to remove POPs from environment.
(D) POPs control should be done with fish and meat supply.

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統計: A(6), B(9), C(21), D(26), E(0) #2059663

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