广东省四校联考2023-2024学年高三上学期第一次联考英语试题答案-2024-2025英语周报圈

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in Virginia.21.Why did a set of tree seeds remain on Earth?A.To protect them from damage.C.To serve as an object of comparison.B.To save them for the next year.Wht do the uerineD.To control their growth in a natural method.A.Affordable.B.Survivable.C.Reliable.D.Unhearable.23.Why did Fores Serviceomf then?A.To adapt them to the local climate.B.To maintain good social relationships.C.To offer them a better growth environment.D.To celebrate the 200th anniversary of American independence.24.What do we know about the moon trees from the text?A.They have spread around the world.B.Most of them were given away to other countries.C.They have been widely replanted through cuttings.D.They are widely planted in memory of Stuart Roosa.A 27-yearold Chinese citien found out he had AIDS Weeks later,he was told he had acute lymphoblastic leukemia(巴细胞白血病).But scientists offered him a ray of hope:.a bone marrow transplant to treat his cancer and an extra experimentatreatment to try to rid his HIV virus.This involved using the gene editing too!CRISPR-Cas9 to delete a gene known as CCRfrom bone marrow stem cells of the donor before the transplant."After being edited.the cells-and the blood cells they produce-have the ability to resist HIV infection,"lead scientisDeng Hongkui said.People who cry mutated (copeof CCR5 are highly immune to HIV,because the virus uses apromade by thisgeneineron'l.Amnwthe Brin patient became thefrst perfHIVitheordafervng boe mrowfroonohhad themutaioryThepidand the experiment wasced ou the summer of2017.Itwas the first time that CRISPRCashadnHIVptinIn1nemonthstheemedoeheeymphoblastic leukemiwasermi()oor ellcarrying thedegne persistedBat there erenof them tormvetheHTVnthe ptient body.Only approme5of the ptienoewcelcried theedied geneBt ng doen'tse thisasfeThe main purpose of the study wasoevalue the sferyand preticbiyofidst celtransption forAID treatmentd Deng.The CCRgeaion has beendth21inreased risk of dying early,aceording to a paper published in Nature,though it's unclear why.China has invested heavily in geneediting technology,making biotechnology one of the priorities of itsFive-YearPlandn201.Dengysouingwawntobo-reateiuAIS,hemophilibeta thalassemiaand that,thanks tonew technology,the goal ofafunetionl re for AlDSis gettingdo25.How does HIV virus enter a person's cells?A.Through edited CCR5.B.Through a mutated gene.C.Through bone marrow stem cells.D.Through a protein made by CCR5.26.What can be learned from Deng's study?A.Researchers failed to rid HIV virus completely from the patient.B CRISPR-Cas9 has been used on different HIV patients.C.Cells with genetic mutation can resist HIV infeetionD.Scenss deleted CCR5from stem cells of the patien.27.What cweoabout ge ehoy?B It is supported by the govermentA.It is a mature technology.D.It continues to perform well in clinicaltessC.helpsre odreatedisefficy

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