肠外营养最严重的穿刺技术性并发症是（）。 A.气胸 B.纵隔血肿 C.空气栓塞 D.
题型：单项选择题
问题：
肠外营养最严重的穿刺技术性并发症是（）。
A.气胸
B.纵隔血肿
C.空气栓塞
D.胸导管损伤
E.血胸
题型：单项选择题
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| Hello,boys and girls! My name is Betty Smith. I'm 12 years old. I'm a Chinese and I'm from Beijing.I like reading and playing computer games. I'm a middle school student and I  'm in Class 1 Grade 7. There are 40 students in my class----20 boys and 20 girls. Miss Li is my English teacher. Her English is very good and she is very kind. We all like her very much.
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