禁止标志的图形符合为（）
A、圆环和斜杠图形
B、三角形图形
C、圆形图形
D、长方形图形
参考答案：A
All flights because of the storm, they had to wait in the hall.
A．have put off
B．were put off
C．have been put off
D．having been put off
均匀稀薄白带
A．轻型子宫内膜炎、子宫肌炎B．产后下肢血栓静脉炎C．急性盆腔腹膜炎D．脓毒血症E．产褥中暑
