2024年100所名校高考模拟金典卷 24新高考·JD·英语-Y 英语(1-5)答案

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cells.A man,known as the Berlin patient,became the first per- son to be cured of HIV in the world after receiving bone marrow transplants from donors who had the mutation naturally. The patient agreed and the experiment was carried out in the summer of 2017.It was the first time that CRISPR-Cas9 had been used on a HIV patient.In early 2019,nineteen months after the treatment was done,the acute lymphoblastic leukemia was in complete remission (and donor cells carrying the edited gene persisted.But there weren't enough of them to remove the HIV virus in the patient's body.Only approximately 5%to 8% of the patient's bone marrow cells carried the edited gene. But Deng doesn't see this as a failure."The main purpose of the study was to evaluate the safety and practicability of genetically

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