5 In order to have a clean ocean, governments should impose a(n) _________and strict ban on the dumping of radioactive waste at sea.
(A)inefficient
(B)irregular
(C)palpable
(D)permanent

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統計: A(2), B(5), C(6), D(5), E(0) #1571143

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#2436884
(A)inefficient  無效率的...
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