四面____方 自____自____ 守____待兔
随风____散 千____百____ 目不____睛
往浅绿色的Fe(NO3)2溶液中逐滴加入稀盐酸时,溶液的颜色变化应该是( )
若0是关于x的一元二次方程(m-1)x2+5x+m2-3m+2=0的一根,则m值为( )
This meeting room is a non-smoking area. I would like to warn you _____ that if you smoked here you would be fined.