给下面多音字注音并组词。
难( )_____
( )_____
奇( )_____
nán 困难 nàn 灾难
qí 奇怪 jī 奇数
I _____ her not to walk on the thin ice but she would not listen to me.
A.warned
B.persuaded
C.suggested
D.noticed
在同一量的多次测量过程中,误差的绝对值和符号以不可预定的方式变化的误差称为()
A.系统误差
B.疏忽误差
C.偶然误差
D.测量误差