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对缺血性脑卒中起到最有效二级预防作用的 LDL-C 水平是(  )。 


a.
≤ 4.9 mmoL/L 

b.
≤ 3.4 mmoL/L

c.
≤ 2.6 mmoL/L 

d.
≤ 1.8 mmoL/L 
 参考答案:
 佳题速递:
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