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【单选题】
操作系统是企业网络管理平台的基础，其安全性是第一位的，作为一名合格的企业安全管理员，应了解以下操作系统所面临的哪些安全威胁。（）A.
操作系统软件自身的漏洞
B.
开放了所有的端口
C.
开放了全部的服务
D.
病毒
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皮皮学刷刷变学霸
举一反三
【简答题】Listen carefully and answer questions.
【简答题】Listen carefully and make proper responses
【简答题】Listen carefully and make proper responses
【单选题】It is a good habit to________，for people will always believe in you. [ ]
A.
keep one’s wo rd
B.
hold one’s breath
C.
help oneself
D.
get ready
【简答题】Listen carefully and make proper responses
【单选题】Some works of literature hold one's interest to the very last page, but others serve only as a ______, to be kept handily at a bedside table.
A.
reference
B.
soporific
C.
pleasure
D.
reminder
【单选题】hold one’s feet to the fire
A.
scold one severely for a mistake
B.
do some bad things secretly
C.
get control over someone or something.
D.
ruin one’s own plan through foolish words
E.
to put pressure on someone to do something
【单选题】hold one’s feet to the fire ( )
A.
do some bad things secretly
B.
get control over someone or something.
C.
ruin one’s own plan through foolish words
D.
to put pressure on someone to do something
【简答题】Listen carefully and make proper responses
【简答题】Listen carefully and make proper responses
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