一条下水管道,计划每天安装120米,15天完成,实际只用了10天就完成了.实际每天安装多少米?
120×15÷10
=1800÷10
=180(米)
答:实际每天安装180米.
— What are the _______ doing there?
— They are busy _______ their science experiment.
A.Boys students; to do
B.Boy students; to do
C.Boys students; doing
D.Boy students; doing
新安装的发电机或发电机大修以后应做哪些试验?