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【多选题】
In the admin GUI, you navigate to "System" > "Status" > "Active Users". You see several buttons, including "Delete Session", "Delete All Sessions". "Refresh Roles", and "Disable All Users".Which two statements are true?（）A.
To forcibly sign out a single user, you should select the check box next to that user's login name, then select "Delete Session".
B.
If you select "Delete All Sessions", all users are forcibly signed out and are unable to sign in again until "Enable All Users" is selected.
C.
Selecting "Disable All Users" prevents users from signing in and starting a new session, but does not forcibly sign out any users that already have an existing session.
D.
Selecting "Refresh Roles" re-evaluates authentication policies, role-mapping rules, and resource policies for all existing user sessions.
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举一反三
【单选题】声音信号的数字化需要三个步骤:采样,量化和编码。用有限个幅度值近似原来连续变化的幅度值,把模拟信号的连续幅度变为有限数量的有一定间隔的离散值。这种是
A.
采样
B.
量化
C.
编码
【简答题】____是用有限个 值近似原来连续变化的幅度值,把模拟信号的连续幅度变为有限数量的有一定间隔的离散值。