下段食管癌易转移的区域为（）
A、锁骨上区
B、纵膈
C、肺门
D、腋下
E、腹腔内
参考答案：E
明代传奇的舞台体制是生旦。
Emergency line operators _______ always stay calm and make sure that they get all the information they need to send help.
A．can
B．would
C．must
D．might
