RNC接受到RAB建立请求后，通过（）协议建立Iu数据传输承载.
A.NBAP
B.RANAP
C.RASAP
D.ALCAP
参考答案：D
Her grandmother often takes ______ after dinner. [ ]
A. walking
B. to walk
C. walks
D. a walk
如果急冷油泵密封管线堵了，应如何处理？
