重金属检查第一法使用的试液是
A.AgNO3试液B.硫代乙酰胺试液C.BaCl2试液D.KI-SnCl2试液E.NH4SCN试液
参考答案:B
Melissa and LoveLetter made use of the trust that exists between friends or colleagues.Imagine receiving an () from a friend who asks you to open it. This is what happens with Melissa and several other similar email () . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages () . As administrators seek to block dangerous email attachments through the recognition of well-known () , 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 () access to your network.
web pages () .
A.memory
B.caches
C.ports
D.registers
从企业全过程管理来看,()
A.危机处理比危机管理更重要
B.危机管理比危机处理更重要
C.危机管理比危机预防更重要
D.危机预防比危机处理更重要