【判断题】手术复发对硫脲类无效者选用放射性碘131I。
【单选题】单选题-甲亢手术后复发对硫脲类无效者宜选用
【简答题】用555定时器及电阻R 1 、R 2 和电容C构成一个多谐振荡器电路。画出电路,并写出脉冲周期T的计算公式。
【简答题】You will now listen to part of a lecture. You will then be asked a question about it. After you hear the question, you will have 20 seconds to prepare your response and 60 seconds to speak. Now play t...