By saying "... owners of well over half of all Wor

单项选择题

By saying "... owners of well over half of all World Wide Web sites have set up home without fit- ting locks to their doors" (Lines 3--4, Par

A．2), the author means that ________.A. those happy times appear still to be with usB. there simply wasn't any crime to worry aboutC. many sites are not well-protectedD. hackers try out tricks on an Internet site without actually breaking in