Big ocean fish have almost been endangered since the start of business fishing in the1950s

Big ocean fish have almost been endangered since the start of business fishing in the
1950s. The scientists found that the number of large fish has dropped by 90 percent in the
past fifty years. The study took ten years. The researchers collected records from fishing
businesses and governments around the world. The magazine Nature published(发表)the findings.
The scientists say the common way called longline fishing is especially harmful to large fish. This way includes many fishing lines that are connected(连接) to one boat. If these lines are joined together, they can reach one hundred kilometers. They hold thousands of sharp metal hooks(钩) to catch fish. Longline fishing is especially common in the Japanese
fishing industry. Records showed that Japanese boats used to catch about ten fish for every
one hundred hooks. The study says longline fishing boats now might catch one fish per
hundred hooks.
The scientists say business fishing can destroy groups of fish much faster than in the
past. It’s not the only worry that the number of large fish is becoming smaller and smaller.
What’s worse, they are smaller in size than their ancestors(祖先).
根据短文内容完成表格，每空一词。
What is happening to ocean fish?
Items (项目)
Situations
Results
【小题1】
of ocean fish
The number of ocean fish has dropped by 90% in the past fifty years.
The number of fish【小题2】
Smaller and smaller.
The size of ocean fish
Big ocean fish have almost been 【小题3】 since the start of business fishing in the 1950s.
The size of ocean fish is not
【小题4】 as that in
the past.
The way of fishing(捕鱼)
Long-line fishing can be especially had to 【小题5】 .
Business fishing can destroy
fish groups a lot faster than
in the past.
business fishing

(答案→)business fishing 解析：【主旨大意】本文是一篇说明文，介绍了longline fishing这种捕鱼方式对鱼类的危害。【小题1】细节理解题 由第一段的“Big ocean fish have almost been endangered since the start of business fishing in the1950s.”可得出答案。【小题1】细节理解题 由最后一段的“It’s not the only worry that the number of large fish is becoming smaller and smaller.”可得出答案。【小题1】细节理解题 由第一段的“Big ocean fish have almost been endangered since the start of business fishing in the1950s.”可得出答案。【小题1】细节理解题 由最后一段的“What’s worse, they are smaller in size than their ancestors(祖先).”可得出答案。【小题1】综合理解题 根据文章中对捕鱼方式的介绍可知longline fishing这种捕鱼方式特别适合捕鱼。

就是这个解释