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【单选题】
在如图所示稳压二极管电路中,已知UZ1=7V,UZ2=3V,两向导通电压均为0.7 V,该电路输出电压为多大?( )。
A.
7V
B.
4V
C.
3V
D.
10V
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【单选题】男性,34岁,吸烟8年,反复咳嗽、咯痰3年。2个月来发热,体温37.6~38.2℃,咳嗽加重,咯少量白痰,痰中偶带血丝,伴乏力、盗汗、关节酸痛,食欲稍减退,体重下降5kg。今晨漱口时突然咯鲜血,量约100ml。X线胸片发现左肺有片状阴影,其间有透亮区。导致咯血最可能的疾病是
A.
慢性支气管炎
B.
支气管扩张
C.
肺癌
D.
肺结核
E.
先天性多发性肺囊肿
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A.
把痰液吐进纸篓中
B.
把痰吐人垃圾袋内
C.
把痰吐到厕所内
D.
把痰液吐到痰盂内倒掉
E.
吐在卫生纸里包好后焚烧
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A.
evoked set
B.
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C.
physiological risk
D.
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E.
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【单选题】T he girls ____ several gifts, but she didn’t _____ them.
A.
accept; receive
B.
received; accepted
C.
received; accept
D.
receive d; accept
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A.
肺癌
B.
肺曲菌病
C.
肺结核
D.
肺炎
E.
肺脓肿
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