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【单选题】
下列哪项关于中脉压的叙述是不正确的（ ）。A.
中脉压的正常值是0.49～0.98 kPa (5-10 emi120)
B.
中脉压的变化一般比动脉压变化晚
C.
中脉压低于0.49 kPa(5 emi1，0)时，表示血容量不足
D.
中脉压高于1.47 kPa(15 emi1，0)时，提示有肺循环阻力增加，心功能不全
E.
中脉压受血容量、静脉血管张力等因素的影响
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