如果|﹣a|=|﹣4|,则a=( ).
±4
The medium believes the price of petrol will rise by more than ____ two percent. [ ]
A. other
B. another
C. any other
D. the other
边长为a的闭合金属正三角形框架,完全处于垂直于框架平面的匀强磁场中,现把框架匀速拉出磁场,如图所示,则选项中图象规律与这一过程相符合的是( )
A.
B.
C.
D.