键盘 https://note-img-1300721153.cos.ap-nanjing.myqcloud.com//md-imgkeyboard.jpg https://m.tb.cn/h.fJyTktT?tk=WxDM27wmkme
内存 https://note-img-1300721153.cos.ap-nanjing.myqcloud.com//md-imgmemory.jpg https://m.tb.cn/h.fpCOW0i?tk=F0Jq27wmJmW