你一定有很多的好朋友吧!把你最好的朋友向大家介绍一下好吗?希望把他的爱好特点也能写出来,相信你能行!
设集合M =x|x=k2+14,k∈Z,N =x|x=k4+12,k∈Z,则 ( )
In the last few years, China ___ great achievements in environmental protection.
Look! Lucy is ________ a new red dress. She is beautiful today.