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.
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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
设两个关系中分别包括m和n个属性,它们具有同一个公共属性,当对它们进行自然连接,运算结果的关系中包括的属性个数为()
A. m′n
B. m+n-1
C. m+n
D. m′n-1
下脚手架应走斜道或梯子,或沿绳、脚手立杆、横杆等攀爬。
A. 正确
B. 错误