I am looking ______ my shoes, but I can't find them. [ ]
A. after
B. at
C. up
D. for
答案:D
下列情况下,最不可能出现股价上涨(继续上涨)情况的是( )
A.低位价涨量增
B.高位价平量增
C.高位价涨量减
D.高位价涨量平
如图所示,根据通电螺线管的磁感线方向,可判断通电螺线管的左端为______极,电源的a端为______极,小磁针的b端为______极.