资料题：Books in a library are stored in different orders, such as the order designed according to（　）。

James wrote a play for television about an immigrant family who came to England from Pakistan,and the problems they had settling down in England.The play was surprisingly successful,and it was bought by an American TV company.James was invited to go to New York to help with the production.He lived in Dulwich,which is an hour' s journey away from Heathrow.The fight was due to leave at 8:30 am, so he had to be at the airport about 7:30 in the morning.He ordered a mini -cab for 6:30, set his alarm for 5:45, and went to sleep.Unfortunately he forgot to wind the clock, and it stopped shortly after midnight.Also the driver of the mini-cab had to work very late that night and overslept.James woke with that awful feeling that something was wrong.He looked at the alarm clock.It stood there silently, with the hands pointing to 12: 10.He turned on the radio and discovered that it was, in fact, ten to nine.He swore quietly and switched on the electric kettle.He was just pouring the boiling water into the teapot when the nine o'clock pips sounded on the radio.The announcer began to read the news,"...reports are coming in of a crash near Heathrow Airport.A Boeing707bound for New York crashed shortly after taking off this morning.Fight number 2234..."James turned pale."My fight," he said out loud."If I hadn't overslept, I' d have been on that plane.