在春季，地表水水温回升，水中气体可能产生释放，这种物理现象可能对处理设施产生的影响是

热水锅炉紧急停炉的条件是什么？

票据保证的绝对记载事项为( ) 。

A．保证人名称

B．被保证人名称

C．保证日期

D．保证人签章

1964年10月12日，长沙市长王群伍宣布，长沙市第二次人口普查胜利结束，长沙城区人口是？59万？69万？79万？109万？

Virtual reality (or VR (1) ) is kind of a buzzword these days in computer graphics.VR is artificial reality created by a computer that is so enveloping that it is perceived by the mind as being truly real.VR exists in many (2) .A traditional view of virtual reality uses headsets and data gloves.The headset serves as the eyes and ears to your virtual world,projecting sights and sounds generated by the computer.The data glove becomes your hand,enabling you to interact with this (3) world.As you move your head around,the computer will track your motion and display the right image.VR is the most demanding (4) for computer graphics,requiring hardware and software capable of supporting realtime 3D (5) .

A．dummy

B．simulated

C．fictitious

D．invented

从所给的四个选项中，选择最合适的一个填入问号处，使之呈现一定的规律性。（）

A．

B．

C．

D．