guard（）

填空题

guard（）

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问答题

The guard looked at us with a cold ﹍.

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判断题

In-Band/Guard Band模式下，NB-IoT支持多载波操作

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判断题

IP源防攻击(IP Source Guard，IPSG)是一种基于三层接口的源IP地址过滤技术，它能够防止恶意主机伪造合法主机的IP地址来仿冒合法主机，还能确保非授权主机不能通过自己指定IP地址的方式来访问网络或攻击网络。

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判断题

time. ◆If you want to see the Changing of the Guard ceremony, get to the Castle grounds at 11: 00. ◆During the summer it happens every day, if the weather is good.Windsor Castle is a family home for the British kings and queens.You can visit Windsor Castle on 16 Oct.2018.If you want to visit Windsor Castle, you can buy ticket on the internet in advance.They should pay at least ￡57.40 if Mr. and Mrs. Green visit the castle.The Changing of the Guard Ceremony might not take place in summer if the

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