侵袭性生长，手术不彻底常易复发的牙源性肿瘤是（）
A.牙源性鳞状细胞瘤
B.牙源性纤维瘤
C.成釉细胞瘤
D.牙源性腺样瘤
E.牙瘤
参考答案：C
Which of the following statements about statistical concepts is FALSE（）
A. A frequency is a tabular display of data summarized into a relatively small number of intervals.
B. An interval is a set of return values within which an observation not falls.
C. A parameter is an descriptive measure of a population characteristic.
患者男性，23岁，咳嗽、发热，对症治疗后好转，2周后出现肉眼血尿，关于血尿描述正确的是（）
A.尿沉渣高倍镜下视野红细胞>5个
B.尿沉渣低倍镜下视野红细胞>5个
C.尿沉渣高倍镜下视野红细胞>3个
D.尿沉渣低倍镜下视野白细胞>10个
E.1000ml尿液含有10ml血方可表现为肉眼血尿
