题目内容

试述过劳致病的机理。

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过劳(名词解释)

A．finishingB．restrictingC．reducingD．inducing

A. finishing
B. restricting
C. reducing
D. inducing

What does the man want to do？

A. Have lunch.
B. Update his file.
C. Pay with a check.
D. Get a medical exam.

疫气通过空气和接触传染，多从()、皮肤侵入人体;也可随饮食、蚊叮虫咬、血液、或()等途径侵入人体而发病。