Frank works as ______. A: a security guard at a university B: a security guard at university C: a security guard at the university D: security guard at a university

Which kind of security is more complicated A: security used to send credit card data B: security used in Webs C: security used within the company

要验证交换机端口的端口安全配置，可使用哪个命令 A: showinterfacesport-security B: showport-securityinterface C: showipinterface D: showinterfacesswitchport

________<br/>means the level for which appropriate additional<br/>protective security measures shall be maintained for a period of time<br/>as a result of heightened risk of a security incident. A: Security level 1 B: Security level 2 C: Security level 3 D: Security level 4

helping to 3)______________ and save energy. A: prove security B: improve C: improving security D: improve security

The beta of a security is calculated by A: dividing the covariance of the security with the market by the variance of the market. B: dividing the correlation of the security with the market by the variance of the market. C: dividing the variance of the market by the covariance of the security with the market. D: dividing the variance of the market by the correlation of the security with the market.

________means<br/>the level for which further<br/>specific protective<br/>security measures shall be maintained for a limited period of time<br/>when a security incident is probable or imminent, although it may not<br/>be possible to identify the specific target. A: Security level 1 B: Security level 2 C: Security level 3 D: Security level 4

Personal security, financial security, health and well-being fall into the category of social needs.

在外文数据库中，检索关于“information security”的文献，以下哪个检索条件查准率最高（ ）。 A: Full Text=information security B: Abstract=information security C: Abstract=information security or Abstract=information safety D: Abstract=information security and Year=2010-2019

Submission of ship security plans,or amendments, for approval shall be accompanied by____on the basis of which the plan, or the amendments, have been developed. A: the declaration of Security B: the Security Assessment C: the Port Facility Security Plan D: the Passage Plan