The top detective asked the witness if he had seen _______ at about 10 p.m.
A:anything unusual last night
B:unusual something the night before
C:something unusual last night
D:anything unusual the night before
选择最佳答句( )
按角的大小,三角形可以分为____三角形、____三角形、____三角形。
进行有性生殖的高等动物的生殖和发育如图所示,图中①、②和③过程分裂表示()
已知数列an的前n项和Sn=n2-2n,则a2+a10= ( )
1吨活鱼从常熟尚湖运往苏州城区,应选择哪种交通运输方式较为合理( )