【单选题】下列关于变压器的叙述正确的是()。
A.
110kV以上的变压器在停送电前,中性点必须接地。
B.
变压器可以在正常过负荷和事故过负荷情况下运行,正常过负荷和事故过负荷可经常使用。
D.
变压器在空载损耗等于短路损耗时运行效率最高。
【单选题】男,58岁,吸烟20年,反复咳嗽咳痰8年,活动后气急3年,近日受凉后出现发热、咳嗽加剧,痰量多,白色泡沫样,查体双肺叩诊过清音,双肺底散在细湿啰音。提示最可能的诊断
【单选题】听力原文:W: I hope you like the novel I lent you. I wasn't sure whether it was the kind of book you would be interested in. M: You know, I had the same doubt at first. But once I started I simply couldn't...
A.
He enjoyed reading the novel.
B.
He hasn't started reading the novel yet.
C.
He doubts the woman will like the novel.
D.
He'll lend the woman the novel after he has read it.
【多选题】患者,男性,50岁,咳嗽,咳痰史10多年,每年持续3月以上,活动后气急2年,病情加重3天,呼吸困难,查体:双肺叩诊过清音,听诊双肺干湿啰音。提示:查体:心率130次/分,双下肢中度水肿,该患者的诊断应考虑()。
【多选题】患者,男性,50岁,咳嗽,咳痰史10多年,每年持续3月以上,活动后气急2年,病情加重3天,呼吸困难,查体:双肺叩诊过清音,听诊双肺干湿啰音。提示:患者出现发热,T:39.0℃。提问:为明确诊断应做下列哪项检查()
【单选题】-I hope you are a good trip! - ______. [ ]
【多选题】患者,男性,50岁,咳嗽,咳痰史10多年,每年持续3月以上,活动后气急2年,病情加重3天,呼吸困难,查体:双肺叩诊过清音,听诊双肺干湿啰音。提示:查体:心率130次/分,双下肢中度水肿,该患者的诊断应考虑()
【单选题】听力原文:W: I hope you like the novel I lent you. I wasn't sure whether it was the kind of book you would be interested in. M: You know, I had the same doubt at first. But once I started I simply couldn't...
A.
He doubts the woman will like the novel.
B.
He hasn't started reading the novel yet.
C.
He enjoyed reading the novel.
D.
He'll lend the woman the novel after he has read it.
【单选题】听力原文:W: I hope you like the fiction I lent you. I wasn't sure whether it was the kind of book you would be interested in. M: Yon know, I had the same doubt at first. But once I started I simply couldn...
A.
He forgot where he had put the book.
B.
He doubted whether he would finish reading the book.
C.
He found the book too simple.
D.
He was fascinated by the book
【单选题】I hope you have a good trip. _______.