—_______ ten o'clock _______ night.
A:At, on
B:In, on
C:At, at
“坐地日行八万里”中的地是指( )
若a= 20152016-1,则(a﹣1)2=____ .
因人之力而敝之,不仁;____,____;以乱易整,不武。(《左传》)