第14题: [单项选择]Recent research into aging suggests that the body's defense mechanisms may lose the ability to distinguish what is alien. A. insane B. infectious C. foreign D. poisonous 参考答案:C 答案解析: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。
A. working as a soldier B. working as a servant C. working as a repairman D. working as a fisherman 参考答案:A 答案解析:[精解] 文章理解题。根据题干的提示,可以在第二段找到"After serving in the US Navy(海军)for 20 years",一下知道他是在当海军,所以[A]选项working