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【单选题】
下列关系式中不正确的是( ) .A.
0 Î Æ
B.
0 Ï {1 ， 2 ， 3 ， 4}
C.
3 Î { x | x 2 -9=0}
D.
2 Î { x | x >0}
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举一反三
【简答题】数据模型三要素中属 数据 静态特征的有: 和 。 属于数据的动态特征 的有: 。
【单选题】You navigate to "UAC" > "Infranet Enforcer" > "Auth Table Mapping" in the admin GUI. You see one policy, which is the unmodified, original default policy.Which statement is true?（）
A.
Dynamic auth table mapping is not enabled.
B.
A successful authentication attempt will result in a new authentication table entry, which will be delivered only to the Junos enforcer protecting the network from which the user has authenticated.
C.
To create a static auth table mapping, you must delete the default policy.
D.
The default policy applies only to the factory-default role User.
【单选题】Which one is not the local snack of Tianjin.
A.
Goubuli Steamed Stuffed Bun
B.
Stretched noodles
C.
Ear-Hole Fried Cake
D.
Gui Fa Xiang Fried Dough Twist
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