[填空题]
If two firecrackers produce a s48 z9*iso;nkc l6v zhlound wya/zyl i1,2o1 yzd q-level of 95 dB when fired simultaneously at a certain place, what will be the sound level if only one is exploded? [Hint: Ad2yz-dy/ qyz,li oaw11d intensities, not dB’s.] dB
