A．The different stages of "culture shock" in details.
B．The various aspects of emotional confusion.
C．Some useful advice to the newcomers going to a foreign country.
D．Several mixed conceptions of the American culture.

A．A battery-operated system on the train will control and bring the cars to a smooth stop.
B．The magnetic attraction will hook the cars firmly.
C．The cars equipped with a device will run in a special guide way.
D．The internal power will keep the cars steady.