問題詳情

【題組】51. Which of the following devices may be improved with the researchers’ findings?
(A) Smoke detectors.
(B) Security cameras.
(C) Electric bug killers.
(D) Fire extinguishers.

參考答案

答案：A
難度：困難0.341463
統計：A(14),B(5),C(10),D(12),E(0)

用户評論

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