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單項(xiàng)選擇題

Most Computer operating systems in use today, including all consumer-targeted systems, include a TCP/IP（）.

A.plan
B.requirement
C.implementation
D.design

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單項(xiàng)選擇題

Today there are （）computers in our homes and offices than there are people who live and work in them.

A.less
B.more
C.little
D.lotsof

單項(xiàng)選擇題

Very long, complex expressions in program are difficult to write correctly and difficult to（）.

A.defend
B.detect
C.default
D.debug