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Many people are disturbed by the genetic diversity of cancers — an inevitable
Many people are disturbed by the genetic diversity of cancers — an inevitable
游客
2025-03-26
27
管理
问题
Many people are disturbed by the genetic diversity of cancers — an inevitable consequence of random evolution. Cancer therapies【C1】______be applied fairly randomly or carelessly, but nowadays many believe that effective therapies need to be【C2】______and tailored to genetic faults in each individual’s cancer.
However, a personalized treatment disregards the most fundamental reason why it is difficult to cure cancers【C3】______: cancer cells adapt and evolve【C4】______treatment. Even drugs that are initially effective often have a【C5】______diminishing effect, as the biological systems blocked by the treatment spontaneously compensate【C6】______re-routing the cancer cells’ internal wiring,【C7】______the cancer’s ability to spread. To use an【C8】______, traffic hot spots in towns can cause major traffic jams, but smart drivers will quickly find other short cuts. Then, in the absence of "short cuts", evolution【C9】______: naturally arising mutant cancer cells that are【C10】______the targeted drug rapidly outgrow their disabled siblings and cancer comes back. [br] 【C3】
选项
A、in the past
B、on the horizon
C、once for all
D、by no means
答案
C
解析
in the past:在过去(与本句中的现在时矛盾);on the horizon:马上出现;once for all:一劳永逸地,彻底;by no means:绝不。cure cancers once for all的含义是“根治癌症”。
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