32 The best way to protect yourself in a chemical emergency is to shelter inside, shut all windows and doors and turn off any ________ systems, and listen to emergency service broadcasts.
(A) alarm
(B) ventilation
(C) computer
(D) prevention

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統計： A(12), B(52), C(9), D(2), E(0) #2768363

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#5749354
The best way to protect yourself in a chemical emergency is to shelter inside, shut all windows and doors and turn off any ________ systems, and listen to emergency service broadcasts.
在化學災害（難）中，保護自己最好的方法就是在室內避難，關閉所有的窗戶，以及關掉所有的__________系統，並解注意聆聽緊急服務廣播。

(A) alarm 警報
(B) ventilation 通風
(C) computer 電腦
(D) prevention 預防
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