【单选题】__________arriving home she found her oldfriend already there.
【单选题】彩色多普勒血流显像仪,滤波器的主要作用是()
【单选题】When she returned home, she found the window open and something ____.
【单选题】____ home, she found that she had left the key at the office.
【单选题】患者自觉呼吸气急而短促,不能接续,似喘而不抬肩,喉中无痰鸣声者,称为( )。
【单选题】( ) home, she found that she had left the key at the office.