记忆的心理过程包括诅记、保持、回忆和认知四个环节。()是巩固已经识记的知识和经验的过程,使识记材料较长时间地保持在脑海中。
A.识记
B.回忆
C.认知
D.保持
参考答案:D
从医院选取肺癌病人和非肺癌病人,比较以前是否吸烟与肺癌的关系;需计算的指标是
A.RR
B.患病率
C.发病率
D.OR
E.AR
I cannot______ puzzled, for I simply cannot understand how I could have made such a stupid mistake.
A.help feel
B.help but to feel
C.but to feel
D.help but feel