生态系统的物质循环
An administrator runs mktcpip aixhost 172.168.0.50 enO to change the network address， but the command hangs for an extended period of time. Which of the following is the most likely cause of the problem（） entO is in a defined state。 enO is currently active。 There is no physical network adapter on the system。 The address 172.168.0.50 is in use by another system。
按封堵头可承受的压力分类，封堵方法分为（）封堵。 低压、中压和高压。 低压、中高压和超高压。 低中压、高压和超高压。 低压、中压、高压和超高压。
在设计换热器时，可适当（）管内流速，以提高管内换热系数，强化管内传热。 减小。 先减小后加大。 加大。 保持不变。
After putting together a configuration that meets customer’s requirements， a TDA is suggested. The customer is not familiar with the TDA process and asks why this should be done. This of the following is the benefit of TDA？（） A TDA are recommended only for high end hardware and very large or complex business opportunities。 A TDA will ensure the solution and configuration are complete and technically sound and meet customer requirements。 A TDA will guarantee that the hardware will work in customer’s environment at the volumes projected。 A TDA brings an IBM technician onsite to properly inspect and installed hardware and related software。
我国的（）出台了自己的地区性法规，以规范当地的网上企业交易主体的认定。
