[单选题] Many viruses go resident in the memory like a().

1、[多选题]The World Wide Web also subsumes previous Internet information s ystems such as().

• A、Gopher
• B、Telnet
• C、Ftp
• D、FTP

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2、[多选题]which is the threat to computer security in the following choices?

• A、Computer Criminals
• B、Computer Crime
• C、earthquake
• D、Human Errors

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3、[多选题]Information stored in semiconductor RAM is

• A、volatile
• B、permanent
• C、non volatile
• D、non permanent

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4、[多选题]()is a type of eｘecutable file.

• A、EXE file
• B、COM file
• C、JPG file
• D、TXT file

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5、[多选题]A digital computer is generally made up of five dstinct elements:a central processing unit,().

• A、memeory storage devices
• B、crt screen
• C、a bus
• D、output devices
• E、input devices

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