Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an （71） from a friend who asks you to open it. This is what happens with Melissa and several other similar email （72） . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages （73） .As administrators seek to block dangerous email attachments through the recognition of well-known （74） , virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users.Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the （75） access to your network.

A．names

B．cookies

C．software

D．extensions

1930年5月，毛 * * 写了（）一文，阐明了坚持辩证唯物主义的实事求是、坚持理论与实际相结合的原则的极端重要性，为中 * * 党正确解决中国式的武装夺取 * * 的道路问题奠定了思想基础

A．《中国革命战争的战略问题》

B．《中国革命和中 * * 党》

C．《反对本本主义》

D．《中国的红色 * * 为什么能够存在？》