不是恶性溃疡特点的是()
A.形状不整齐,火山口状
B.直径常>2cm
C.较深
D.边缘隆起
E.周围黏膜皱襞中断
参考答案:C
饮水型地方性砷中毒病区的判定依据()。
A.有砷中毒病人
B.有高砷水源存在
C.饮用井被含砷废水污染,有砷中毒病人
D.有高砷水源,有典型慢性砷中毒病人,可排除其他污染
E.饮水井含砷量超标,有典型砷中毒病人,井旁长期有含高砷废料堆放
Hangzhou _______ the beautiful scenery of West Lake.
A.is Known for
B.is known to
C.is known as
D.is know to