“夫其为物,厥美可珍。廉方有则,体洁性贞。含章蕴藻,实好斯文。取彼之弊,以为此新。”材料赞叹的技术成果是( )
A:白瓷
B:造纸术的进步
C:文人画
D:印刷术的出现
(____) It's a programme about China.
(____) We've got lots of food.
(____) Thank you for talking to us.
(____) She couldn't read or write.
(____) He didn't have any legs then.
如图所示是某反应前后的微观示意图,“ ”和“ ”表示两种不同的原子.则该反应( )
若集合M=x|y=x-1,集合N=y|y=x-2,那么M∩N=( )