氯胺酮的麻醉作用主要与哪一受体有关（）
A.GABA受体
B.α受体
C.DA受体
D.β受体
E.NMDA受体
参考答案：E
_____ a mobile phone can you ring _____ you want to talk with anywhere. [ ]
A. Using; whoever
B. Only on; whomever
C. Only by; whatever
D. With; anyone
