問題詳情

40 Make sure your oxygen equipment is stored safely out of direct sunlight, well____ , and away from heatsources.
(A) valued
(B) violated
(C) vanished
(D) ventilated

參考答案

答案：D
難度：困難0.372881
統計：A(10),B(12),C(10),D(22),E(0)