推销观念是一种现代市场营销观念。（)

A．When your computer is on, only RAM is used to store information.

B．When your computer is on, only disk drives are used to store information.

C．When your computer is off, only RAM is used to store information.

D．When your computer is off, only disk drives are used to store information.

（74）

A．When your computer is on, only RAM is used to store information

B．When your computer is on, only disk drives are used to storinformation.

C．When your computer is off, only RAM is used to store information

D．When your computer is off, only disk drives are used to storinformation.

（74）

A．When your computer is on, only RAM is used to store information

B．When your computer is on, only disk drives are used to storinformation.

C．When your computer is off, only RAM is used to store information

D．When your computer is off, only disk drives are used to storinformation.

The CPU does not have to look(66)all of RAM to find the spot it needs. But RAM only(67)the data temporarily. As soon as you switch the computer(68), all that information disappears from the RAM. When you switch the computer on again, the RAM is(69), and ready(70)a new program and new data.

A．on

B．through

C．for

D．down upon

A、saturation and active regions

B、active and cutoff regions

C、saturation and cutoff regions

D、active region only

He cannot be tired _______ he has walked only half a mile.

A：since

B：whether

C：when

D：as long as

Whenever new information is entered, it must be stored somewhere in the computer's(70). RAM only(71)the data temporarily. That is, all information stored in the RAM will disappear if you switch the computer off.

A．processor

B．keyboard

C．printer

D．memory

A．on

B．at

C．for

D．in

When researching materials for your speech, you should:()

A.Use a variety of resource materials to give a more balanced approach to your speech.

B.Avoid magazines since they are not books.

C.Never use a book since it is probably dated material.

D.Not use computer research since it generally has a bias.

A．A

B．B

C．C

D．D