start the machine and cutting the paper.And we will sent you manual and video ,we suggest you to come to visit our factory to learn more thing by yourself , and if there is something goes wrong , you can call us ,video-chat ,email us .And we will giv...
根据第三段If someone needs first aid,even if you call an ambulance straight away,you may need to wait a while.There is often traffic on the roads.Some people in the US made an app called PulsePoint.It invites common people trained in CPR(心肺复苏)to use it.Th...