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【单选题】
男，60岁，锄草时出现严重的呼吸窘迫，无发热咳嗽，咳痰和感冒症状，吸烟每年600多支。体检：不能说出完整一句话，呼吸动度微弱，肺有喘鸣，双肺底有水泡音。X线胸片：双肺高度膨胀，纹理粗，双侧胸腔少量积液，心脏侧位片较以前有轻度增大；ECG示：心动过速，胸导有轻微ST段压低，鼻导管吸氧3L/min时，血气pH 7.30，PaCO2 6.7kPa(50mmHg)，PaO2 16kPa(120mmHg)，最可能的诊断是A.
晚期肺疾病伴COPD
B.
COPD恶化，衰竭
C.
肺栓塞
D.
亚临床病毒感染COPD急性恶化
E.
支气管哮喘
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【简答题】数控系统主要组成部分有哪些？
【简答题】以数据集{4，5，6，7，10，12，18}为结点权值所构造的哈夫曼树，其带权路径长度为？Construct a Huffman tree with the weights {4，5，6，7，10，12，18}. What is the weighted external path length?
【单选题】Peter's Audio Shop has a cost of debt of 7%, a cost of equity of 11%, and a cost of preferred stock of 8%. The firm has 104,000 shares of common stock outstanding at a market price of $20 a share. The...
A.
6.14%
B.
6.54%
C.
8.60%
D.
9.14%
【简答题】In June an investor purchased 300 shares of Oracle stock at $20 per share. In August she purchased an additional 400 shares at $25 per share. In November she purchased an additional 400 shares, but th...
【多选题】下列句子中存在词类活用现象的有( )。
A.
他一张脸便是感激的脸,浮雕在这旷漠夜天里。
B.
别看他温温吞吞的，其实骨子里很男人。
C.
你发如雪凄美了离别，我焚香感动了谁。
D.
她站在人群中,苍白消瘦的脸上浮现着幸福的红晕。
【简答题】In June an investor purchased 300 shares of Orcale stock at $20 per share. In Aug. she purchased an additional 400 shares at $25 per share. In Nov. she purchased an additional 400 shares, but the ...
【简答题】What is the weighted-average cost of capital for a firm with a 40/60 debt/equity split, 8% cost of debt, 15% cost of equity, and a 34% tax rate?
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