2022耳鼻咽喉科(医学高级)题库第一章气管食管解剖生理题库冲刺密卷单选题正确答案(04.19)

1. [单选题]Lubricating oil should be changed on a heavy duty diesel engine when（）.

A. it gets dark in color
B. a sample rubbed between fingers feels thin
C. it has been in use for a specified interval
D. it no longer supports combustio

2. [单选题]在无水、无电的条件下进行渗透探伤，应选用那种渗透探伤方法（）。

A. 溶剂去除型荧光渗透法
B. 溶剂去除型着色渗透法
C. 后乳化型荧光渗透法
D. 后乳化型着色渗透法

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