如图,在△ABC中,∠B=90°,AD平分∠BAC,BC=10cm,CD=6cm,则点D到AC的距离为( )cm。
4
根据汉语提示填词。
1. Jenny ___________ eats a sandwich for lunch. (通常)
2. Li Ming ___________ goes to school on foot. (有时)
3. Steven ___________ wears a blue jacket. (总是)
4. Kim ___________ wears a pair of shorts. (从来没有)
5. Today is rainy. Wang Hong goes to school with her ___________. (雨伞)
通常所说的I/O设备指的是( )。
A.网络设备
B.通信设备
C.输入输出设备
D.控制设备