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男孩，８岁。反复发热10余天，以发热待查收住院。其祖父患肺结核。该患儿因发热在院外每天用地塞米松5mg。体检：无明显阳性体征，结核菌素试验阴性。说明

A. 未受过结核感染
B. 已感染结核，但尚未产生变态反应
C. 机体免疫反应受到抑制
D. 重症结核病人假阴性
E. 未接种过卡介苗

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Section ADirections: This section is to test your ability to understand short dialogues. There are 5 recorded dialogues in. it. After each dialogue, there is a recorded question. Both the dialogues and questions will be spoken only once. When you hear a question, you should decide on the correct answer from the 4 choices marked A) , B) , C) and D) given in your test paper. Then you should mark the corresponding letter, on the Answer Sheet with a single line through the center.

A. Because she likes blue dresses.
Because her other dresses are still wet.
C. Because she has no other dresses.
D. Because she likes dirty dresses

金桔( )A．22B．23C．24D．25

( )禽流感 ( )空气传染病

1岁半，男孩。1个月来痉挛性阵发性咳嗽，伴低热来诊。双肺呼吸音粗，未闻及哕音。结核菌素试验，红肿硬结直径18mm。X线胸透：右肺门阴影增大模糊，右中叶不张。接种过卡介苗，用过青霉素和先锋霉素V等，效果不好。血白细胞9.5×109/L，中性0.40，淋巴0.60。初步诊断是

A. 肺炎合并肺不张
B. 百日咳合并肺炎
C. 支气管淋巴结核
D. 肺原发综合征
E. 支气管异物