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【多选题】
Which three statements are true about DAI？（）A.
DAI intercept all ARP packets on untrusted ports
B.
DAI determines the validity of an ARP packet based on the valid MAC address-to-IP address bindings stored in the DHCP Snooping database.
C.
DAI is used to prevent against a DHCP Snooping attack.
D.
DAI forwards all ARP packets received on a trusted interface without any checks.
E.
DAI forwards all ARP packets on untrusted ports.
F.
DAI determines the validity of an ARP packet based on the valid MAC address-to-IP address bindings stored in the CAM table.
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【简答题】She looks very young ____ her age.
【简答题】请简述小细胞肺癌的治疗原则有哪些？
【简答题】简述原发性支气管肺癌常用的治疗手段及不同类型肺癌治疗原则。
【单选题】Even though she looks very young, she is twice older than my 18-year-old sister.
A.
B.
D.
D
【单选题】Even though she looks very young, she is______my twenty-year-old sister.
A.
twice older than
B.
twice as old as
C.
twice as older as
D.
twice old than
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