MCQOPTIONS
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| 1. |
There is a loud sound when the bulb is broken, because . . . |
| A. | The air quickly enters the vacuum inside the bulb. |
| B. | There is explosive gas inside the bulb. |
| C. | The filament of the bulb interacts with the air. |
| D. | The gas inside the bulb suddenly expands. |
| Answer» B. There is explosive gas inside the bulb. | |