Queckenstedt试验检查的目的是诊断()
A.大脑病变
B.脑干病变
C.小脑病变
D.脊髓压迫症
E.周围神经病变
参考答案:D
甲乙两只小船相距24m,有一列水波在水面上传播时每只船每分钟上下浮动20次,当甲船位于波峰时,乙船位于波谷,两船之间还有一个波峰,可知该水波速度是______m/s.
Don't laugh at _____. You should help them when they are in trouble.[ ]
A. other
B. the other
C. others
D. the others