下列哪种不是形成胆结石的原因
A. 肝合成胆汁酸能力下降
B. 消化道丢失胆汁酸过多
C. 肝肠循环中肝摄取胆汁酸过少
D. 胆汁中胆固醇浓度过低
E. 胆道内异物
阻塞性黄疽的错误描述为
A. 胆汁排泄受阻，结合胆红素逆流人血，直接胆红素升高
B. 重氮反应试验直接阳性
C. 血清间接胆红素无明显改变
D. 尿胆红素检查阴性
E. 尿胆素原降低
What’s wrong with Judy's teeth?
A. One of her lower back teeth was killing her.
B. One of her upper back teeth was killing her.
C. One of her lowerfront teeth was killing her.
D. One of her upperfront teeth was killing her.
Can Judy's teeth be filled?
A. No, it's too late.
B. No, the hole is too big.
C. Yes, it is easy to fill.
D. Yes, but is is expensive to fill.
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