问题
单项选择题
食管()
A、分为颈部、胸部和腹部三段
B、全长粗细一致
C、第3个狭窄在与主支气管相交处
D、第2个狭窄在穿膈肌处
答案
参考答案:A
食管()
A、分为颈部、胸部和腹部三段
B、全长粗细一致
C、第3个狭窄在与主支气管相交处
D、第2个狭窄在穿膈肌处
参考答案:A
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Dear Tom, I was so glad to receive your e-mail. I'd like to tell you something about my English summer camp in Beijing. ________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ ________________________________________________________________ |