A They will work hard to reduce ocean noise pollution.
C They will try to set a limit of 120 decibels.
41. C 42. B 43. A 44. D 45. B
42. B ocean drilling.排除法。第二段:These sounds include the breaking of ice fields, underwater earthquakes, and sounds made by animals themselves.
44. D Their hearing will be damaged by high-level noises.第五段:The research team found that powerful underwater explosions were causing whales in the area to lose their hearing. This seriously affected the whales ability to exchange information and find their way. Some of the whales even died.
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