将下列句子按照逻辑排列其正确顺序（帮帮忙啊!
将下列句子按照逻辑排列其正确顺序（前面是其排列的序号）
- (1.) Repeat the process.
- (2.) Then tilt his head backwards,so that his chin is pointing
- ( 3.) Once you come across a person who has stopped breathing,you should begin immediately to do mouth-to-mouth breathing.
- ( 4.) First,place the victim on his back and remove any foreign matter from his mouth with your fingers.
- ( 5.) Then place your mouth tightly over the victim’s.
- ( 6.) Next,pull his mouth open and his jaw forward,pinch his nostrils shut to prevent the air which you blow into his month from escaping from his nose.
- ( 7.) Blow into his mouth until you see his chest rise.
- ( 8.) Then turn your head to the side and listen for the out-rush of air which indicates an air exchange.