multi-touch interfaces change user interaction with computers by

题目

multi-touch interfaces change user interaction with computers by
A.registering multiple distinct positions of input touches
B.supporting single-user input by means of predefined hand signals
C.supporting multiple-user input by means of standardized head movement
D.encoding verbal sounds that are linked to standardized actions

答案

A.registering multiple distinct positions of input touches
B不会是要看你的手势吧
C要你的头部动作?
D听你的声音判定?
下次可以点采纳吗?我要些积分.
答案是A.