Which of the following situation will be given harsh penalties?
A. drunk driving
B. driving by people who do not hold a valid driver’s licence
C. both of them
D. none of them
查看答案
What isa common speed limiton China’s national highways?
A. 60 km/h
B. 80 km/h
C. 120 km/h
D. 100 km/h
关于流行病学,下列哪种说法是错误的
A. 它是医学的基础学科
B. 以个体为研究对象
C. 可以研究疾病的自然史
D. 能为卫生决策提供依据
流行病学是从( )水平认识疾病
A. 基因
B. 细胞
C. 个体
D. 群体