遇到以下情况,不需要停止推荐助听器并做转诊的是()。
A.波动性听力下降
B.少量耵聍
C.伴有耳痛、耳鸣、眩晕或头痛
D.外耳道耵聍栓塞
E.传导性耳聋
参考答案:B
已知抛物线y=2x2+4x+k-1与x轴有两个交点,求k的取值范围.
Her sister () a rich man. They ()for twenty years.
A. married with; have married
B. married to; have married
C. married; have been married
D. had married; have been married