2016的相反数是( )
A:2016
B:﹣2016
C:12016
D:﹣ 12016
例: Mr Zhou, doctor: ① He is Mr Zhou. ② He is a doctor.
如图1所示,用刻度尺测量铅笔的长度,读数为____cm.一次测量可能误 差较大,为了减小误差,应当____.
My mother is not _____________. She is young.