[单选题] The largest and fastest computers are().

1、[单选题]Electronic commerce may be defined as the entire set of processes that suport()activities on a(n)()and involve information analysis.

• A、society,human
• B、personal,society
• C、commercial,network

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2、[多选题]Instruction format in RISC has

• A、many kinds
• B、one or a few kinds
• C、one kind
• D、a few kinds

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3、[多选题]Middleware lies in

• A、the top of an operating system
• B、the middle of the layering vertical stack
• C、the middle of interactions between different application programs
• D、the top of the layering vertical stack

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4、[多选题]In order to increase our computer’s performance we need to

• A、have a much larger main memory
• B、have a L2 cache
• C、buy a L2 cache
• D、buy a L1 cache

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5、[多选题]Viruses can delay their attack for().

• A、months
• B、weeks
• C、days
• D、years

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