影响无线电波传播的因素有哪些？
参考答案：
有天气，通信距离，天线高度和地形等。
__________ and short of breath, Andy and Ruby were the first to reach the top of Mount Tai. [ ]
A. To be tired
B. Tired
C. Tiring
D. Being tired
某甲亢病人在服他巴唑治疗过程中发现甲状腺体积较治疗前增大，经医师证实后，给予甲状腺素片服用。何故
A．稳定下丘脑-垂体-甲状腺轴功能B．甲状腺抑制过甚C．血中甲状腺量减少D．避免出现甲低E．适当增加新陈代谢率
