9. Such dangerous experiments were often carried out in _____ areas so that no one will get hurt.
(A) disseminated
(B) counterfeited
(C) nontrivial
(D) uninhabited
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統計: A(25), B(22), C(34), D(149), E(0) #2430968
統計: A(25), B(22), C(34), D(149), E(0) #2430968