【单选题】According to the doctor, what is their primary work at present?
A.
Establishing a medical system for those displaced people.
B.
Helping the displaced people rebuilding their homes.
C.
Fighting against the diseases brought by the hurricane.
D.
Calling for help from International Red Cross.
【单选题】现有五个智力测验题目,根据鉴别指数法计算出第一题至第五题区分度分别为:0.30、0.25、0.55、0.78、0.41。区分度最高的题目是
【判断题】饱和甘汞电极是常用的参比电极,其电极电位是恒定不变的。()
【简答题】在0.7、0. ? 7 ? 8 .、0.78、0.7 ? 8 这四个数中,最大的数是______,最小的数是______.
【简答题】78+0.78+0.78+0.78改写成简便算式是______,这个算式表示的意义是______.