最常出现Charcot三联征的疾病是
A．细菌性肝脓肿B．黄疸性肝炎C．胆总管结石D．胰头癌
参考答案：C
5.---Have you handed in your schoolwork yet?
---Yes，I have. I guess it ____ now.
A．has graded
B．is graded
C．is being graded
D．is grading
分散因素
