传导性听力损失纯音测听的特点是：（）A．BC正常，AC下降 B．AC、BC间距通常大
题型：多项选择题
问题：
传导性听力损失纯音测听的特点是：（）
A．BC正常，AC下降
B．AC、BC间距通常大于20dB
C．AC下降不超过65dB
D．听力曲线多种多样，但多数以高频损失较重
E．BC和AC同时下降
题型：多项选择题
After the terrible car accident, the whole world had been completely dark and quiet for Robert Edwards for almost ten years, for he became both blind and deaf after the doctor had saved him. The loss of sight and hearing threw him into such a sorrow that he tried
a few times to put an end to his life. His family especially his wife did their best to tend and comfort him. By and by he finally regained the courage to live on.
On a hot summer afternoon he was taking a walk with a stick near his house when a thunderstorm started all at once. He stood under a large tree in order not to get himself wet. Unfortunately he was st
ruck down to the ground by a lightning. The witnesses thought him dead but he woke up some 20 minutes later lying face down in muddy water below the tree. He felt that he was trembling badly, but when he opened his eyes ,he didn’t dare to believe that he saw a plough (梨子) lying near the wall. When Mrs Edwards came running up to him, she shouted their neighbours for help. And he saw her and heard her voice for the first time in nearly ten years.
The news of Robert’s regaining his sight and hearing quickly spread in his area. And many doctors came to prove the truth of the news. Most of them said that he gained sight and hearing again obviously from the knock of lightning; none of them could give convincing reasons, 
小题1:
小题2:
小题3:
小题4: How did Edwards get his sight and hearing once more according to the doctor?
A．He regained them from head injury when he fell from a tree.
B．His wife’s first visit after almost ten years made him so ha
ppy that he regained them.
C．The lightning took the feeling from his legs and gave the senses of sight and hearing to his head.
D．The blow that caused him blind and deaf was very severe, so it took another severe blow to regain them.