2. 考研
  3. Recent research into aging suggests that the body’s defense mechanisms may lose the ability to distinguish what isalien.

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

admin2013-06-12  11
问题 Recent research into aging suggests that the body’s defense mechanisms may lose the ability to distinguish what isalien.
选项 A、insane
B、infectious
C、foreign
D、poisonous
答案C
解析  画线词alien．意为外国的，外来的，异己的，与foreign同义。辨义：A．insane疯狂的； B．infectious感染的；D．poisonous有毒的。
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