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男孩,9岁,于2005年1月20日来院急诊,病史其父代诉,高热,头痛伴呕吐6小时伴呼之不应,体检,体温40%,面色青灰,四肢凉,全身皮肤见广泛瘀点、瘀斑,心率快,心音较弱,血压未能测出,双肺呼吸音稍粗,脑膜刺激征不明显。本病最主要的发病机理是()

A. 体液免疫功能低下
B. 细胞免疫功能低下
C. Ⅰ型变态反应
D. 脂多糖内毒素致DIC
E. 全身血管通透性增高

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患者男性,57岁,右侧胸部不适3天,无发热,无咳嗽、咳痰。CT示右下肺外基底段楔形软组织密度病变,基底与胸膜相连,内可见小透亮区,内侧可见小血管影,考虑()。

A. 肺梗死
B. 周围型肺癌
C. 过敏性肺炎
D. 肺不张
E. 肺结核

理想流体在同一水平流管内稳定流动时,有截面大的地方()

A. 流速小、压力大
B. 流速大、压力小
C. 流速小、压力小
D. 流速大、压力大

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In your Oracle 10g database , you have scheduled a job to update the optimizer statistics at 05:00 pm every Friday. The job has successfully completed. Which three pieces of information would you check to confirm that the statistics have been collected?()

A. average row size
B. last analyzed date
C. size of table in bytes
D. size of table in database blocks
E. number of free blocks in the free list
F. number of extents present in the table

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