问题
单项选择题
如果用V颈内动脉／V颈总动脉比作为诊断近端颈内动脉狭窄的指标，以下哪个收缩期峰值流速比值，提示颈内动脉管径缩窄率超过70%（）
A.1.5
B.2.0
C.4.0
D.5.0
E.5.5
答案
参考答案：C
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如果用V颈内动脉／V颈总动脉比作为诊断近端颈内动脉狭窄的指标，以下哪个收缩期峰值流速比值，提示颈内动脉管径缩窄率超过70%（）
A.1.5
B.2.0
C.4.0
D.5.0
E.5.5
参考答案：C
| 完形填空。 | |||
| " Who 1___________ these gifts, Jenny? " Li Ming 2___________ quietly. " Did Santa? " " I 3___________ know," Jenny whispers to Li Ming. " I don't think so. I think my Mum and Dad brought 4___________, but Lynn is little! She 5___________ Santa brought them! "
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