GPRS接入网络的方式分为()和()两步。
参考答案:attach;PDP上下文激活
She _____ to the Great Wall several times. [ ]
A. goes
B. has gone
C. went
D. has been
伸直型肱骨髁上骨折,最容易损伤的组织是()。
A.尺神经
B.桡神经
C.正中神经
D.肱动脉
E.臂丛神经