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【单选题】
患者女,69岁,住院1月余,因外周血管均已破损,需长期静脉输液,行中心静脉穿刺,上肢首选的进针血管是A.
锁骨下静脉
B.
肩胛上静脉
C.
肘正中静脉
D.
头静脉
E.
贵要静脉
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【简答题】ME（Medication Errors）（ ）
【单选题】What kind of errors can be ignored?
A.
errors in newly-learnt language areas
B.
performance errors
C.
the errors in structures that might be frequently used in communication
D.
the errors that might cause misunderstanding or even shock the listeners