液压式动力转向系的常见故障有()、()、操纵不稳定和行驶跑偏等。
参考答案:转向沉重;转向不灵敏
QDII基金申购的开放时间包括( )。
A.9:30~11:30
B.9:00~11:00
C.9:15~11:15
D.9:25~11:25
Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an (46) from a friend who asks you to open it. This is what happens with Melissa and several other similar E-mail (47) . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages (48) .
A. attachment B. packet C. datagram D. message
As administrators seek to block dangerous email attachments through the recognition of well-known (49) , 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 (50) access to your network.