A:管道运输
B:公路运输
C:消遣运输
D:铁路运输
关于浮力说法错误的是( )
Mr. Liu is a ____. He works in Bao'an People's Hospital. His house is ____ from the hospital. So he goes to work by ____.He is ____. He helps lots of sick people. He likes his ____.
下列装置或操作能达目的是( )
解不等式组:3-x>x+1(2x-3)-(5x+2)⩽1