去磷硅玻璃主要用的化学试剂是______

A．A．迈阿密B．洛杉矶C．旧金山D．纽约

deral worker. He works for the U.S. government. He has been forced to take a leave of absence. He cannot go to work. It is called a furlough. What does the phrase "leave of absence" mean？A．places in governmentB．working very hardC．time away from workD．staying home sick