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【单选题】
Web 2.0 relies on the idea that the value of a product or service increases as more people use it. This concept is called what?A.
Network consolidation
B.
Network effects
C.
Internet strategy
D.
Accelerated technological change
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举一反三
【单选题】I called you yesterday, but no one _____. [ ]
A.
returned
B.
replied
C.
answered
D.
received
【单选题】— I called you yesterday but no one answered. — Well, Maybe I in the garden at that time.
A.
worked
B.
am working
C.
was working
D.
would work
【单选题】— I called you last night but no one answered the phone. — I ______ dinner with my friends in the restaurant. [ ]
A.
have
B.
had
C.
was having
D.
have had
【单选题】A:Where you last night, Martin? I called you but you at home. B:No, I
A.
were weren't wasn't
B.
are aren't isn't
C.
is weren't wasn't
D.
are weren't isn't
【单选题】主要是指对内存储器的管理,负责对内存的分配和回收、内存的保护和内存的扩充的管理是 ______________ 。
A.
CPU 管理
B.
处理器管理
C.
存储管理
D.
文件管理
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