挑战习题
1/6单选题
难度:

1.某市道路改造中,需要铺设一条长为1200米的管道,为了尽量减少施工对交通造成的影响,实际施工时,工作效率比原计划提高了25%,结果提前了8天完成任务. 设原计划每天铺设管道x米,根据题意,则下列方程正确的是(  )
A
B
C
D
提示1:
IOetiemHj+WFs+ezu+S4uu+8muWOn+iuoeWIkueUqOaXti3lrp7pmYXnlKjml7Y9OA==
正确答案:Qg==
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