Ozone _______ extremely active chemically, and succeeds in damaging any vegetation it comes in contact with.
(A) is
(B) being
(C) which is
(D) by being

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統計： A(320), B(34), C(50), D(8), E(0) #88518

詳解 (共 1 筆)

#321371
Ozone  臭氧
vegetation  植被
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