《城镇燃气设计规范》中规定公称直径大于50mm的液化天然气管道与储罐、容器、设备及阀门连接应采用()连接。(条款9.4.3)
A. 法兰
B. 焊接
C. 螺纹
D. 法兰或焊接
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Which of the following is an advantage of the IBM System Storage SAN Volume Controller overcompeting storage virtualization products?()
A. inline data encryption
B. based on IBM Power servers
C. superior performance benchmarks
D. both in-band and out-of-band virtualizatio