《2025年红对勾高考一轮复习金卷英语》

Test4(2024·四川成都外国语学校模拟)
Sharks and their relatives are some of the most threatened vertebrates (脊椎动物) on Earth. Coral reefs (珊瑚礁) provide homes for countless fish species that are vital for fisheries and are therefore an especially important ecosystem for humans—and one where the decline of shark populations seems to be especially acute.
The study by Simpfendorfer with his team is the result of a worldwide collaboration called the Global FinPrint project. The data analyzed include more than 20,000 hours of standardized underwater video taken at nearly 400 reefs in 67 countries around the world. It reveals declines of 60% to 73% of once - abundant coral reef shark species at reefs around the world.
However, the findings of Simpfendorfer with his team include signs of hope and a clear path forward. Their results show that although shark populations in many reefs had declined, some healthy reef shark populations remained. The reefs with healthier shark populations had some important similarities: they tended to be in the waters of high - income countries with stronger natural resource management regulations. A country that lacks the resources to feed its people is less able to sustainably manage and protect its biodiversity.
The most unexpected result of the study is that a decline or complete loss of shark species in one reef was not always associated with similar changes in nearby reefs. They found that one reef can be overfished so badly that a once - common reef shark species is totally gone, but another reef a short distance away can have healthy populations of that same species. It is likely that healthy populations can eventually help repopulate nearby areas.
The problem is clear—animals that provide ecosystem services that are vital for human food security and livelihoods are disappearing at an alarming rate. The loss of sharks and the ecosystem services they provide represents an ecological disaster that can cause substantial harm to humans. But apparently, the findings have shown a way. If the threat that led to population decline is resolved, then these important and threatened animals may recover.
13. Why is Simpfendorfer with his team mentioned in paragraph 2?
A. To stress the result of global collaboration.
B. To state the urgency of protecting the ocean.
C. To show the severe condition of certain sharks.
D. To present the figures of their contributions to sharks.
14. Simpfendorfer's research found that healthy reef shark populations remained because of ________.
A. strict laws in rich countries
B. developed countries
C. similarities between other waters
D. public awareness of protecting reefs
15. What can be inferred from the text?
A. Changes in reefs lead to loss of shark species.
B. Humans and animals depend on each other in ecosystem.
C. It's not clear whether humans cause damage to biodiversity.
D. The declined shark species have nothing to do with overfishing.
★16. What's the text mainly about?
A. Acute decline of reef sharks.
B. Potential recovery of reef sharks.
C. Global cooperation of saving sharks.
D. Amazing discovery of coral reefs.

答案： 13. C 14. A 15. B 16. B