“海上马车夫”这个绰号形象地说明了17世纪的荷兰在商业、航海业和殖民掠夺各方面所拥有的霸权。但是，“海上马车夫”的好景不长。从17世纪中叶，英、荷便在各大海洋展开了海上争霸战。后来，法国也参与进来。法荷战争席卷了荷兰本土，最终以荷兰的惨败而告终。荷兰从此一蹶不振。

请思考：17世纪的荷兰是怎样对外扩张的？

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