循证医学中诊断性试验常用的指标:()、()、()和()。
参考答案:敏感度;特异度;患病率;阴性预测值和阳性预测值
小题1:The babysitter will work _________ hours from Monday to Friday together.
A. 6
B.10
C.15
D.20小题2:The babysitter will usually work _________.
A.in the morning
B.in the afternoon
C.in the evening
D.at night小题3:What is NOT the babysitter's job?
A.Reading books to the child.
B.Playing games with the child.
C.Cleaning the child’s house.
D.Taking care of the child.
( )是中国工程咨询协会在理事会闭会期间的工作执行机构。
A.省计委
B.常务理事会
C.会员代表大会
D.董事会