【单选题】病人男性,20岁,多次于郊外春游是出现胸闷、窒息感,呼气性呼吸困难,两肺可闻哮鸣音,回家休息后好转。最可能的诊断是
【单选题】问诊时同时测量生命体征,如果发现生命体征不稳定,应立即:
【单选题】You won’t arrive at the station on time ___ you don’t hurry.
【简答题】设一个均匀量化器的量化电平数为M,其输入信号抽样值在区间【-a,a】内具有均匀的概率密度。试求该量化器的平均信号量噪比。
【单选题】When you arrive at the front door, you won’t need a key because the door ________ open with a touch of your finger.
【简答题】A: My American friend has invited me to a 1)__________________ at his apartment. B: That’s great. A: But I’ve never been to a party given by a 2)__________________. I’m afraid 3) I won’t know ____...