问题
单项选择题 A1/A2型题
纵隔是位于两侧胸膜腔之间的组织结构与器官的总称，关于其分界，下列错误的是（）。
A.纵隔前界为胸骨
B.后界为胸椎
C.以胸骨角与第4胸椎下缘的水平连线为界
D.上界为胸廓入口
E.下界为膈肌
答案
参考答案：C
解析：这是用于纵隔的四区划分法，胸骨角至第4胸椎下缘画一横线，其上为上纵隔，其下为下纵隔。
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纵隔是位于两侧胸膜腔之间的组织结构与器官的总称，关于其分界，下列错误的是（）。
A.纵隔前界为胸骨
B.后界为胸椎
C.以胸骨角与第4胸椎下缘的水平连线为界
D.上界为胸廓入口
E.下界为膈肌
参考答案：C
解析：这是用于纵隔的四区划分法，胸骨角至第4胸椎下缘画一横线，其上为上纵隔，其下为下纵隔。
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| When I was ten, my family moved to a housing project in East Los Angeles. Even though we struggled to make 1 meet, my parents stressed to me 2 fortunate we were to live in a great country with 3 opportunities. They imbued(灌输) in me the 4 of family, faith and love for our country. The following year, my dad, Benjamin, injured his back working in a cardboard-box factory and was 5 as a hairstylist. He rented space in a shopping mall and gave his shop the fancy name of Mr Ben's Coiffiure. The owner of the shopping center gave Dad a discount on his 6 for cleaning the parking lot three nights a week, which 7 getting up at 3 a.m. To pick up trash, Dad used a little machine that looked like a lawn mower (割草机) 8 Mom and I emptied garbage cans and picked up litter 9 I did this job for two years, but the lessons I learned have 10 a lifetime. I learnt discipline, a strong work ethic and a 11 attitude towards life, I also learned at an early age the importance of 12 life's competing interests-in my 13 , school, homework and a job. All 14 helped during my senior year of high school, when I worked 40 hours a week at a fast-food restaurant while 15 precollege courses. The hard work paid off. I attended the U.S. Military Academy and went on to get graduate 16 in law and business from Harvard, 17 I joined a big Los Angeles law firm. In these jobs and in everything else I've done, I have never forgotten those days in the parking lot. The experience has 18 me that there is dignity(尊贵) in all work and that if people are working to 19 themselves and their families, that is something we should 20 . | ||||
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