【单选题】Which is the main idea about students in the 1960s?
A.
They took part in protests.
B.
They enjoyed their time at university.
C.
They read books which were forbidden.
D.
They smoked marijuana.
【单选题】一种筛检乳腺癌的实验应用于已经病理检查证实的乳腺癌患者400人和未患乳腺癌400结果患癌组有100例阳性,未患癌组有50例阳性。
则该试验的特异度为()。
【简答题】有一个项目,你需要的物品每天的租赁成本是200美元,购买的投资成本是6000美元,每天的运行成本是100美元,计算租赁成本等于购买成本的天数为()。
【单选题】有一个项目,你需要的物品每天的租赁成本是200美元。购买这一物品的投资成本是6000美元,每天的运行成本是100 美元。计算租赁成本等于购买成本的天数为
【单选题】一种筛检乳腺癌的实验应用于已经病理检查证实的乳腺癌病人400人和未患乳腺第400人。结果患癌组有100例阳性,未患癌组有50例阳性。则该试验的特异度为
【单选题】一种筛检乳腺癌的实验应用于已经病理检查证实的乳腺癌患者400人和未患乳腺癌400人。结果患癌组有100例阳性,未患癌组有50例阳性。该试验的灵敏度为( )
【简答题】数据的完整性指数据的正确性、有效性、 。
【单选题】Which is the main idea about the students in the 1960s?
A.
They smoked marijuana.
B.
They took part in protests.
C.
They read books which were forbidden.
D.
They enjoyed their time at university.