【简答题】Stroke中风 risk factors are determined by ______, lifestyle, and sometimes the environment.
【单选题】What is the major risk factor for stroke?
D.
Family history of stroke
【简答题】Some people can reduce their risk of stroke if they______.
【单选题】According to the passage, which of the following is not the factor determining the risk ?
A.
the sate and type of asbestos
C.
ventilation of working environment
D.
the medicine workers took
【单选题】比较两种疗法对乳腺癌的疗效,首先根据患者年龄将120例患者配成60对,再将每个对子内的2名患者随机分为两组分别采用两种方法治疗。该随机化方法为: