往复泵由哪些零部件构成?往复泵有哪些独特之处?
参考答案:
活塞、泵缸、吸入阀、排出阀。1.压力可以无限高。2.流量与压力无关。3.具有自吸能力。4.流量不均匀。
Although the bulk of industry resources and energies have focused on developing the fastest (1) or slickest (2) more and more mindshare is turning to the evolution of the computer interface. Advancements in the areas of input devices, (3) processing and vitual reality could lead to fundamental changes in the way human and computer interact. The technological battlefield of the future will be adding layers between the user and the raw machine to make the (4) as invisible as possible. (5) represents the next evolutionary step for the interface.
5()
A.application software
B.eye-tracking device
C.application programs
D.vitual reality
()是指接受委托,对建设项目工程造价的确定与控制提供专业服务,出具工程造价成果文件的中介组织或咨询服务机构。
A.工程造价咨询机构
B.工程监理机构
C.工程管理机构
D.工程税务咨询机构