下面一组图像考虑为()
A．正常的肺动脉瓣
B．正常的二尖瓣
C．正常的三尖瓣
D．正常的主动脉瓣
E．变异的主动脉瓣(两个瓣膜)
参考答案：E
_______ their help in the past years, he would be living a hard life and might even have starve to death.[ ]
A. With
B. If it were not for
C. If it had not been for
D. If not
治疗不正确的是（）
A.面神经炎用泼尼松
B.三叉神经痛用卡马西平
C.重症肌无力用新斯的明
D.面神经炎用抗生素
E.偏头痛用麦角胺咖啡因
