黄疸伴右上腹部阵发性绞痛见于
A．肝炎
B．胆道蛔虫
C．胰头癌
D．急性胆管炎
E．肝硬化
参考答案：B
—_______ you read the words in English?
—No, I can’t. They are too difficult for me.
A．Must
B．May
C．Can
D．Need
“灌木林原野事件”
