以下哪一项不是抗衰落技术常用中的分集技术()。
A.空间分集
B.时间分集
C.编码分集
D.频率分集
参考答案:C
—The sick kids in the hospital need our help.
—You're right. So we can't _____ visiting them. [ ]
A. put on
B. put up
C. put off
D. put down
肌电图或诱发电位,主要是检查()
A.肌腱损伤
B.肌肉损伤
C.骨关节损伤
D.炎症
E.周围神经损伤