一件衣服降价20%后是120元，原价是多少元？
120÷（1-20%），
=120÷80%，
=150（元）；
答：原价是150元．
Tom likes doing things with his family. He’s learned much from ___ His family help him a lot.
A．it
B．them
C．he
D．they
高压水泥旋喷桩支护体系属于桩墙结构。
