請依下文回答第 46 題至第 50 題：       A firefighter enters a burning building. In addition to his   46   clothing, boots, gloves and helmet, he also has ahead-up-display (HUD), which presents key data in his field of vision. Moreover, his clothing is fitted with varioussensors that feed the artificial intelligence that follows the firefighter with the firefighter’s position, temperature data,toxic gases and other   47    warnings. The artificial intelligence   48  the data, simultaneously collectinginformation from different sensors in the building and from databases with technical drawings of the structure. Based onall the data, the artificial intelligence sends instructions to the firefighter via his HUD, enabling him to   49    safelythrough the building. Moreover, if there is a group of firefighters who, for example, need to fight the blaze or   50   trappedoccupants, the artificial intelligence can suggest ways in which the firefighters can work together to successfully perform theirtask.
【題組】46
(A) flammable
(B) combustible
(C) fire-resistant
(D) sound-proof