Recent research into aging suggests that the body’s defense mechanisms may lose

游客2025-05-10 25

问题 Recent research into aging suggests that the body’s defense mechanisms may lose the ability to distinguish what is alien.

选项 A、insane
B、infectious
C、foreign
D、poisonous

答案 C

解析 insane患精神病的，极度愚蠢的；infectious有传染性的，易感染的；foreign外国的，异质的；alien外来的，不同的。

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Recentresearchintoagingsuggeststhatthebody’sdefensemechanismsmaylose