对新批号质控品应确定控制限，控制限通常以下述哪一个表示（）
A.平均值
B.变异系数
C.标准差
D.标准差倍数
E.中位数
参考答案：D
From the school name ______ on the package, we guessed that it might belong to a student of our school.
A．saved
B．marked
C．prepared
D．shown
Every month he measures his baby daughter against the wall to see how much ____ she is getting.
A．tall
B．the taller
C．taller
D．tallest
