People don’t usually expend the time and effort to attend a speech unless____()
A. the speech is delivered by a celebrity
B. attending the speech is a course requirement
C. they are invited to the speech
D. they have some interest in the topic
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Linux最早由()开发
A. Richard Petersen
B. Linus Torvalds
C. Rob Pick
D. Linux Sarwar
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
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