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  3. It seems individual cancer cells send out the same distress signals as wo

It seems individual cancer cells send out the same distress signals as wo

游客2024-01-23  34
问题        It seems individual cancer cells send out the same distress signals as wounds, tricking immune cells into helping them grow into tumours. The finding suggests that anti-inflammatory drugs could help to combat or prevent cancer. "Lifelong, if you take a small quantity of something that【C1】______ inflammation （炎症）, such as aspirin, it could reduce the risk of cancer," says Adam Hurlstone of the University of Manchester, UK.
       When tissue is wounded or infected it produces hydrogen peroxide. White blood cells called leukocytes （白细胞） are among the first cells to react to this【C2】______  , homing in to kill the infectious agent, clean up the mess and rebuild【C3】______  tissue. At first, the tissue becomes inflamed, but this subsides as the wound is cleared and rebuilding continues. Now, a study in zebra fish shows that this process is also instigated （唆使） and sustained by tumour cells.
       Hurlstone and his colleagues【C4】______  engineered zebra fish so that skin cells and leukocytes would show different【C5】______  under ultraviolet light. Some zebra fish were also engineered to have cancerous skin cells.
       The team found that the cancerous skin cells secreted （分泌） hydrogen peroxide,【C6】______  leukocytes which helped them on their way to become a tumour. When the team【C7】______  hydrogen peroxide production in the zebra fish, the leukocytes were no longer attracted to cancerous cells and the cancer colonies reduced in【C8】______.
       More alarmingly, the researchers found that healthy skin cells【C9】______ to the cancerous ones also produced hydrogen peroxide, suggesting that cancer cells【C10】______   co-opt them into triggering inflammation.
A） adjacent
B） blocked
C） changed
D） colors
E） damaged
F） figure
G） genetically
H） hue
I） hurtful
J） number
K） somehow
L） somewhat
M） summoning
N） suppresses
O） trigger [br] 【C2】
选项
答案 O
解析 名词辨析题。此处应填入名词与this共同构成react to的宾语。根据此句前半部分可以得知白细胞首先对此产生反应,后半部分说自动导引到伤口消灭感染源,清除伤口污物。由此可知，原文中白细胞产生反应的对象是一种诱发因素,再结合选项中的名词,可以推断trigger一词符合原文意思。
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