下列平均指标中,()因为是根据位置确定的,所以不受极端变量值的影响。
A.众数
B.简单算术平均数
C.中位数
D.加权算数平均数
参考答案:C
- Did you attend Tom’s birthday party at the Grand Hotel?
- I wish I _______. I _______ an English lecture in the school hall. [ ]
A. have; gave
B. did; have given
C. do; had given
D. had; was giving
内服药在药瓶上应贴哪种颜色边的标签
A.红色B.黄色C.蓝色D.黑色E.白色