以下四个选项中,哪一项中的所有软件都属于虚拟现实引擎/游戏引擎()
A. 3ds Max,Maya,SketchUp
B. Photoshop, Illustrator,CoreDraw
C. OSG;Unity;Vega;Unreal
D. Visual Studio,AutoCAD,ArcGis
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HMD是什么的缩写()
A. Heavy mount display
B. Helmet-moving display
C. Head-mounted display
D. Head Moving display
假设现在有两个变量分别是x和y,其中x=3,y=5,以下选项中______不能交换两个变量中的值()
A. x,y=y,x
B. x=y
C. y=x
D. C.t=x
E. x=y
F. y=t
G. D.x=x+y
H. y=x-y
I. x=x-y
The doctor suggested that the patient()smoking and drinking
A. cut away
B. cut down on
C. cut back
D. cut off
Which of the following bonds can be treated as weak bonds or secondary bonds()
A. dipole–dipole interactions
B. the London dispersion force
C. hydrogen bonding
D. metallic bonding