美加明()
A.M受体阻断药
B.N1受体阻断药
C.N2受体阻断药
D.α受体阻断药
E.β受体阻断药
参考答案:B
北极地区一年中夜最长的季节,白天有多长[ ]
A、24小时
B、12小时
C、0小时
D、18小时
Late _____the afternoon of a cold day in February ,two gentlemen were sitting Over their wine in a restaurant.
A in B on C of D at