用经纬仪对某角观测4次，由观测结果算得观测值中误差为±20"，则该角算术平均值的中误差为( )
A、±2.5"
B、±5"
C、±10"
D、±20"

How to translate 清代康熙年间 into English？ ...

单项选择题How to translate 清代康熙年间 into English？ A.
Kangxi ere in Qing Dynasty B.
Qing Kangxi Dynasty C.
Kangxi in Qing Dynasty D.
Kangxi years in Qing Dynasty

已知串S=‘aaab’,其Next数组值为（    ）。【西安电子科技大学 1996 一、7 （2分）】 ...

单项选择题已知串S=‘aaab’,其Next数组值为（    ）。【西安电子科技大学 1996 一、7 （2分）】 A.
-1 0 1 2 
B.
-1 1 2 3
C.
1 2 3 1
D.
0 1 2 1

Once you’re absolutely sure you’ll quit your job, you’d...

单项选择题Once you’re absolutely sure you’ll quit your job, you’d better _______.
A、 make a game plan and line up another job before leaving
B、 send an email to the HR department and notify every colleague
C、 transfer your work to someone else and leave without hesitation