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【单选题】
正常心尖搏动的位置？A.
第四肋间，左锁骨中线外 0.1-0.2cm
B.
第五肋间，左锁骨中线内 0.5-1.0cm
C.
第四肋间，左锁骨中线内 1.2-2.0cm
D.
第五肋间，左锁骨中线外 0.2-0.5cm
E.
第五肋间，左锁骨中线内 1.0-1.5cm
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