16. What is the major radionuclide introduced to Pacific Ocean during Japan's Fukushima Daiichi power plain accident in year of 2011?
(A) 615fdd77d9190.jpg
(B) 615fdd95d0279.jpg
(C) 615fddb6d5ecc.jpg
(D)615fddd813737.jpg
(E)615fddf9b2473.jpg

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統計： A(0), B(0), C(2), D(0), E(0) #2788464