在同一条件下,多次测量同一量值时,数值和符号()的方式变化着的误差,称为随机误差。
参考答案:不可预定
阅读下列内容,从每小题所给的四个选项中选出一个最佳答案。
小题1:The people in needn’t go to work on Fridays.
A.Canada
B.Scotland
C.Japan
D.Egypt小题2:If it is 8:00 a.m. in western Canada, the time is _______ in eastern Canada.
A.11:00a.m
B.2:00 p.m.
C.12:30 p.m.
D.4:00 a.m.小题3:While Canadian children are waking up, children in Scotland are ________.
A.having lessons
B.sleeping
C.watching TV
D.playing games
按照马斯洛的理论,尊重他人的需要属于()
A.生理需要
B.生长性需要
C.社会需要
D.缺失性需要