介绍： 1.
A. Find a mate.
B. Search for food.
C. Avoid predators.
D. Measure the depth of the water.
2.
A. Carbon dioxide.
B. Noise pollution.
C. Overfishing.
D. Biological invasion.

1. What hearing function is not mentioned in this news report?
A. Find a mate.
B. Search for food.
C. Avoid predators.
D. Measure t...

介绍： 1.
A. Find a mate.
B. Search for food.
C. Avoid predators.
D. Measure the depth of the water.
2.
A. Carbon dioxide.
B. Noise pollution.
C. Overfishing.
D. Biological invasion.

1. What hearing function is not mentioned in this news report?
A. Find a mate.
B. Search for food.
C. Avoid predators.
D. Measure the depth of the water.
2. What is the suggested reason for the malfunction of hearing for clownfish?
A. Carbon dioxide.
B. Noise pollution.
C. Overfishing.
D. Biological invasion.

Spectacular（惊人的） tropical（热带的） clownfish（小丑鱼） who live around ocean coral reefs（珊瑚礁） rely heavily on their hearing（听力）, say scientists. It helps them find a mate（伴侣）, forage（搜寻） for food, and crucially avoid predators（ 捕食其他动物的动物） lurking（潜伏） in the depths. Scientists from the University of Bristol in England bred（繁殖） baby clownfish then exposed different groups of them to different levels of carbon dioxide in the water around them -- one at today's levels, and the others at the levels the world's oceans are predicted to reach by 2050 and the year 2100. They tested their hearing by piping into（用管道把…输入） each tank the sounds of the coral reef -- those in today's conditions swam away from the noise of predators. Those in the mocked-up（模仿的） waters of the future showed no response（回应）, suggesting they couldn't hear. Scientists say the more carbon dioxide we emit（排放）, the more oceans absorb and the more acidic（酸的，酸性的） the water becomes, and that has potentially（潜在地，可能地） devastating（损坏，摧毁） consequences（结果） for fish. What they don't know though is whether fish will be able to adapt and tolerate（忍受） the changing waters.

答案：DA