76m2n3与19m3n2的分母分别是6m2n3、9m3n2，故最简公分母是18m3n3．
故答案为18m3n3．
—How tall is he?
—He's _____. [ ]
A. 1.5 metre tall
B. 1.5 metres tall
C. tall 1.5 metre
D. tall 1.5 metres
锅炉阀门配置有什么要求？
