We can infer from the passage that______.A．offensive breath can"t easily be curedB．elderly
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We can infer from the passage that______.
A．offensive breath can"t easily be cured
B．elderly people are less offended by bad breath
C．heavy drinkers are less affected by bad breath
D．offensive breath is less affected by alcohol
请帮忙给出正确答案和分析，谢谢！
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正确答案：A
推理题。根据前文可知，大多数的口臭根源于口腔内的细菌，但要接触到并杀死这些细菌却十分困难，从而推断出此病不易治愈，所以[A]符合文意，故为正确答案。[B]“老年人很少受到口臭的困扰”与第六段第一句的文意不符，即唾液的流速随着年龄的增长而减缓，因而老年人比年轻人更易受到口臭的困扰，故排除；[C]“酗酒者不易受口臭的影响”和[D]“酒精对口臭没有多大影响”的说法均不正确，根据文意可知，酒精会影响唾液的正常流速而导致口臭，故均排除。