A:(-∞,32
B:-∞,32
C:32,+∞)
D:32,+∞
There are __________ people in the Tiananmen Square.
某农场开挖一条长480米的渠,开工后每天比原计划多挖20米,结果提前4天完成。若设原计划每天挖x米则()