There are a few measures that you can take to ensure that your Jazzax DVD player stays in top condition for as long as possible. For the best performance, please abide by the following guidelines:
...Store the machine on a flat surface and in a dry area.
...To protect the electrical circuit, do not leave the machine on standby for long periods.
Unplug it from the electrical outlet when you know you will not be using it in the near future.
...Always use the eject button when opening and closing the machine. Handling the machine manually may cause damage to the components.
...If the machine becomes dusty or dirty, clean it gently with a damp cloth. Do not use any chemical agents.
The Jazzax DVD Players is under warranty for a maximum of 3 years. If you experience any problems with the machine, visit the Jazzax website for common troubleshooting problems and advice. Or, if the information on the website does not meet your needs, you can call the Jazzax service center at 1-800555-0786 and one of our technicians will come and take care of it.

A:Read the warranty carefully B:Clean the machine with gentle chemicals C:Refrain from closing the machine by hand D:Dry the machine after cleaning

In a computer，which of the following is the longest period? （）

A:Beat period B:Machine period C:Instruction period D:CPU period

There are several periods in a computer, the longest period is ( ).

A:instruction period B:machine period C:beat period D:CPU period

There are several periods in a computer, the shortest period is( ).

A:instruction period B:machine period C:beat period D:CPU period

In a computer, which of the following is the longest period ？（）

A:Beat period B:Machine period C:Instruction period D:CPU period