患者，男，56岁，渐进性声嘶3个月，伴憋气、呼吸困难5小时急诊入院。门诊资料：缺；专科检查：患者有发绀，三凹征明显，呈典型吸气性呼吸困难，紧急监护，心率加快，血氧饱和度85%。
患者明确最后诊断最有效的措施是（）
A.梗阻解除后直接喉镜检查
B.先行喉部检查，活检，然后气管切开
C.梗阻解除后，行喉部检查，如有新生物可行活组织取材病理切片检查
D.气管切开后，一期手术切除喉新生物，术后行病检
E.环甲膜切开
F.以上都不对
参考答案：C
任务型阅读 Our teacher work very hard. They get up early in the morning and work very late. How to help our teacher ? First, we must try to learn our subjects（科目）well to make our teachers spend less time on us and let them have more rest. Second, we must clean the blackboard and the teacher’s desk very often. If (如果) we can do so, our teachers will work better and of course they will be happier. Our teachers often have to speak for a long time and they are very thirsty(口渴的). At this time, it is better for us to bring them some water. When our teachers drink the water, they will speak more clearly (清楚). After our teachers correct (批改)our exercise books, we can help to hand them out (分发它们). If we do so, our teachers can have a short rest. We all know that our teachers care about our marks (关心我们的分数) most, so we should try to go over(复习) our lessons to get high grades（成绩）.If all of us can get high grades, our teachers will feel (感觉)very happy.
| ||||||||||||||