7. The World Health Organization classified radio-frequency electromagnetic fields as
possibly ______ to humans.
(A) carcinogenic
(B) minuscule
(C) overwrought
(D) obsequious
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統計: A(44), B(9), C(15), D(15), E(0) #1901746
統計: A(44), B(9), C(15), D(15), E(0) #1901746