[4 | 次の英文を読み。 以下の設問に答えよ。 (配点 60点)
Oysters are the jarest creatures tbat have been shown to “hear" the worid
around them. New researCh suggests that hearing might be commonplace 回
"mollusks an other simple marine creatures, so the impact of noise pollution from
Ships and exploration might be far greater than Currently assumed.
Jean-Charles Massabuau at the University of Bordeaux in France and his
colleagues placed 32 Pacimc oysters in tanks and exposed them to a range
Cf sounds of varying loudness with frequencies between 10 snd 20.000 hertz.
Rers tend to dlose their valves when stressed or threatened, so they were
with Ceeropcters to frack wielher they opened or dpeed ま
