下列与癌症无关的疾病是()
A．慢性肝硬化
B．萎缩性胃炎
C．结肠息肉病
D．甲肝
E．EB病毒
参考答案：D
The reason _____ he failed the exam was that he spent more time playing and less time learning. [ ]
A. because
B. that
C. why
D. which
磨矿工为什么要坚持按规定时间测定矿浆浓度？
