如果定义基站的发射功率是40 dBm,请问基站的发射功率相当于多少瓦?
参考答案:
发射功率(W)=10^(40/10)=10000(mW)=10(W)(5分)
The small town is so good a place ________ many people come to visit ________ it has become
well known all over the world. [ ]
A. as;that
B. that;that
C. as;as
D. that;as
血清甲状腺素(T3、T4)降低见于( )
A.亚急性甲状腺肿伴功能亢进
B.应用雌激素
C.Grave病(弥漫性甲状腺肿伴甲亢)
D.结节性甲状腺肿伴功能亢进
E.垂体前叶功能减低