C:相同质量的N2和N4所含原子个数比为1∶2
A:“四中子” 粒子不显电性
B:被称为零号元素是因为该粒子不含质子
D:第二种粒子的化学式为N4,与N2互为同素异形体
We'll have a Christmas Party on Christmas Day! What can you do for the party,my dear friends? Oh,let me see.Tina can sing some nice songs.Mary can dance.Peter can do some kung fu.Mike can draw cartoons.Liu Yun can play the pipa and John can play the piano.They are helpful! What can I do? Oh,I can play the violin! My English teacher,Miss Lee,can sing and dance for us.We are so happy and we can't wait!
下列数据中,最接近生活是实际的是( )
十九世纪初期的流行语:“开谈不说《红楼梦》,读尽诗书也枉然。”这句话说明了( )
康有为维新思想的特点是( )