Most colds are caused by rhinoviruses, but there are around 160 different types and they mutate so easily they rapidly become re

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问题 Most colds are caused by rhinoviruses, but there are around 160 different types and they mutate so easily they rapidly become resistant to drugs, or learn to hide from the immune system.

选项 A、embark
B、sham
C、alter
D、deter

答案C

解析 本题考查动词辨析。they rapidly become…system是they mutate so easily省略引导词that的结果状语从句,故根据rapidly become resistant to可知,mutate含有“变化、抵抗”的意思。alter意为“改变,更改”,与之含义相近,故答案是C项。embark意为“上船,开始从事”;sham意为“假装,冒充”;deter意为“制止,阻止”。mutate意为“转变,转换”。
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