题目内容

患者,男42岁。发现腭部包块半年,伴有明显疼痛。肉眼观察肿物与周围组织无明显界限。镜下见瘤细胞包括腔上皮细胞和肌上皮细胞,结构上以瘤细胞排列成筛状结构为主,此外肿瘤细胞可构成管状、实性小条索或团块,并可见瘤细胞小条索浸润神经。上述所见最符合的诊断是()

A. 肌上皮癌
B. 腺样囊性癌
C. 多形性低度恶性腺癌
D. 恶性混合瘤
E. 上皮肌上皮癌

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磁感应强度的变化总落后磁场强度的变化,这种现象称为()。

A. 磁滞现象
B. 涡流
C. 磁滞损耗
D. 剩磁

A customer wants to install an IBM BladeCenter infrastructure but is concerned about the cost of the internal fibre switches. Consequently. the customer wants to use the Optical Pass-Thru Module (OPM). What TRUE statement should be mentioned to the customer regarding the OPM?()

A. You can not put the Optical Pass-Thru Module in the same IBM BladeCenter chassis as a Cisco Intelligent Ethernet Switch.
B. Using blade servers with the Optical Pass-Thru Module will require more fibre ports on the external fibre switch.
C. The Optical Pass-Thru Module does not provide the customer with an opportunity to reuse their fibre switch.
D. The blade servers do not work with the Optical Pass-Thru Module.

患者,女,54岁,因体位改变时眩晕发作2周就诊。近2周来,无明显诱因发生躺下时短暂旋转性眩晕发作,伴有恶心,眩晕发作时无意识障碍、无黑矇、无肢体麻木等就诊。患者进行Epley法治疗后,眩晕缓解,一周后再次发作,特点和检查与第一次相同,则患者宜进行下列哪项治疗()

A. 再次Epley法治疗
B. Semont释放法
C. 口服"眩晕停"半个月
D. 进行半规管阻塞手术
E. 进行后壶腹神经截断术
F. 进行前庭神经切断术

过剩煤气必须点燃放散,放散管管口高度应高于周围建筑物,且不低于()m,放散时要有火焰监测装置和蒸汽或氮气灭火设施。

A. 4
B. 5
C. 10
D. 50

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