《2025年5年中考3年模拟九年级英语下册人教版》

IV 短文填空（每小题2分，共20分）
　从方框中选择适当的词并用其正确形式填空,使短文完整、通顺(每空一词,每词限用一次)。

      that alive plant lucky so use

      we build since program

    Tree rings can provide an idea of the Earth's climate.Ice cores　(冰芯)　can give　　29 information on past temperatures.Now researchers have found that turtle shells(龟壳)can also help scientists study nuclear(核的)pollution.
　The research was publlished in the scientific magazine PNAS Nexus.It studies how uranium (铀)　　30　　up in the outer shellls of turtles.
　The researchers studied five different turtles. They all came from areas　　31　　have been affected by nuclear polllution.Researchers checked if uranium was in their outer shells.Every layer of shell is just one year of the turtle's1life.　　32 they can show what happened in the environment around the creatures.
　One of these turtles came from Enewetak Atoll.It was pulled from the ocean in1978. Enewetak Atoll,in the Pacific Ocean,was the site of43nuclear tests.The sea turtle was probably not 33　　during the time of the testing.However,researchers still found uranium in the turtle shell20 years after testing ended.
　 Researchers also looked at a turtle from Oak Ridge.This site of a nuclear area in the US has processed uranium　　34　　1943.The turtle was taken out of a river in1962.
　 The fission(核裂变)of radioactive elements (放射性元素)gives nuclear weapons(武器) their power.　When the nuclear weapons are 35　,they also cause these elements to end up in the environment.Over time,the radioactive elements are taken into the local ecosystem.36　　and creatures then get them.That's why scientists were able to find uranium in turtle shells.
　　　37　,these shells weren't radioactive.The uranium happened in very small amount,said study co−author Cyler Conrad.He is an earth scientist at the Pacific Northwest National Laboratory.The health of these creatures also likely wasn't influenced,he said.
　　Laura Martin is an environmental historian at Williams Colllege.She says the study points out the dark side of nuclear　　38　.“This paper lets us know nuclear history is not just a human history,"Martin says.“It continues to influence the whole ecosystem."
29.______30.______31.______32.______33.______34.______35.______36.______37.______38.______

答案： 29. us；30. builds；31. that；32. So；33. alive；34. since；35. used；36. Plants；37. Luckily；38. programs