作为一个合格的现代公民,我们应该( )①自觉树立法律意识 ②维护法律的尊严③自觉依法自律 ④从小事做起预防违法犯罪
A:①②③④
B:②③④
C:①③④
D:①②④
①X+Y(NO3)2=X(NO3)2+Y ②X+H2SO4(稀)≠
③M+H2SO4(稀)=MSO4+H2↑ ④N+MSO4=NSO4+M.
见下面的图示,哪个字母所代表的时期属于“社会主义现代化建设的新时期”( )
—I'm not good at basketball,you know.
—________.We are playing for fun. Just try and you'll see you can.( )