不定项选择
阴离子表面活性剂除具有良好的表面活性外,都具有很强的杀菌作用,主要用于消毒、杀菌。
A．正确
B．错误
阴离子表面活性剂除具有良好的表面活性外,都具有很强的杀菌作用,主要用于消毒、杀菌。
A．正确
B．错误
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多项选择题
VRshooting is different from conventional shooting,Whatare the differences?( )
VRshooting is different from conventional shooting,Whatare the differences?( )
A．VR
shooting is not limited by time and space
B．The
director's preparatory work is different
C．VR
photographers need to stay away from the camera, preferably in the
dead corner
D．Once
the shooting starts, the VR camera does not need the cameraman to
operate the device beside the camera