問題文
A warehouse walkthrough shows steel racking and a metal roof on every aisle. Which pair states what reflection leaves behind and what the metal itself avoids doing?
選択肢
- Smooth metal turns the arriving wave back into the room, so the reflection leaves several arrival hops and the metal avoids turning the wave into heat in that environment.
- Smooth metal turns the arriving wave back into the room, so the reflection leaves several arrival pathways and the metal avoids turning the wave into heat in that environment.
- Smooth metal turns the arriving wave back into the room, so the reflection leaves several arrival hops and the metal avoids turning the wave into echoes in that environment.
- Smooth metal turns the arriving wave back into the room, so the reflection leaves several arrival pathways and the metal avoids turning the wave into echoes in that environment.