26．东南亚最大的平原是
A．湄南河平原
B．湄公河平原
C．红河平原
D．华北平原
答案：B
He had a wonderful childhood, ____ with his mother to all corners of the world. [ ]
A. travel
B. to travel
C. traveled
D. traveling
室间隔缺损的常见并发症不包括
A．支气管肺炎
B．充血性心力衰竭
C．肺水肿
D．亚急性细菌性心内膜炎
E．脑脓肿
