题目内容
Combination keys perform a function when held down in combination with another key.
查看答案
搜索结果不匹配？点我反馈
更多问题
An optical mouse uses light in order to detect movement.
A touch screen is classified as a special type of scanning device.
A stylus uses pressure to draw images on a screen.
Multitouch screens allow for interaction such as rotating graphical objects on the screen with your hand.
微信支付 
支付宝支付