气管在（）平面分为左、右主支气管，其分叉处称（）。
参考答案：胸骨角；气管杈
—How is the debate of your essay?
—It ____ well, but I ____one of the key points.
A．might work; hadn’t forgot
B．needn’t have worked; forgot
C．could have worked; forgot
D．would work; hadn’t forgot
某陈列馆举办“建国后农村生产关系变革”图片展。现有以下四幅图片，请按时间先后顺序排列( )
A．①②④③
B．②③①④
C．②①③④
D．③①②④
