A:play
B:to play
C:plays
+(﹣7)=____,﹣(+1.4)=____,+(+2.5)=____,﹣+(﹣5)=____;﹣﹣(﹣2.8)=____,﹣(﹣6)=____,﹣﹣(+6)=____.
“野渡无人舟自横”是怎样的画面?
29+x=56
x=____