在驱动力矩一定的条件下，机电系统的转动惯量越小，其（）越好

（2010年潍坊质检） 2008年9月6日11时25分，我国在太原卫星发射中心成功地以“一箭双星”方式将环境与灾害监测预报小卫星(简称“环境减灾”)A、B卫星送入太空。据此回答1~2题。

小题1:“环境减灾”卫星对生态环境和灾害进行动态监测，直接应用的技术是

A．遥感技术

B．地理信息系统技术

C．全球定位系统技术

D．数字地球小题2:“环境减灾”卫星不能直接监测的自然灾害是

A．台风

B．洪涝

C．地震

D．森林病虫害

高血压危象患者的用药应选择（）

A.合并哮喘，首选钙拮抗剂

B.妊娠高血压，首选硫酸镁

C.合并左心功能衰竭，选用利尿剂，同时选用硝普钠、硝酸甘油或酚妥拉明

D.合并冠心病，选用血管扩张剂，必要时给予β-受体阻滞剂

E.以上均正确

本义

轻钢龙骨隔墙的罩面板安装时，一般从墙的中间开始向两边安装。

Virtual reality (or VR (65) 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 (66) .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 (67) world.As you move your head around,the computer will track your motion and display the right image.VR is the most demanding (68) for computer graphics,requiring hardware and software capable of supporting realtime 3D (69) .

67（）

A.dummy 

B.simulated 

C.fictitious 

D.invented