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问题 多项选择题

关于一次认证l2tp和二次认证l2tp的描述，正确的是：（）。

A.一次认证l2tp只在LAC认证

B.一次认证l2tp只在LNS认证

C.二次认证l2tp在LAC和LNS都进行认证

D.二次认证l2tp可以不在LAC端认证

答案

参考答案：B, C

问答题

Ade, a keen pottery collector, saw a notice for an auction of Bede pottery in the January edition of Antiques News. He travelled 300 kilometres to attend the auction in order to bid for a particularly rare example of Bede pottery, specifically mentioned in the lists of items to be auctioned. However, when he got to the auction site he found a notice outside, stating that the auction had been cancelled. Ade went into a nearby antique shop and saw an example of the type of pottery he had come to bid for. The price ticket stated that it was ￡500, but Ade said he was only willing to pay ￡350 for it. The shopkeeper, Chip, said he would sell it for ￡400 and as Ade said he would like time to think about it over lunch, Chip agreed not to sell it before Ade returned.However, when Ade returned to buy the pottery, he found that Chip had already sold it to someone else, who had paid ￡450 for it.Required:In the context of contract law, advise Ade whether he can take action against:

(b) Chip, for not selling the pottery to him.
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单项选择题

用来预防儿童结核病的疫苗是（）。

A.卡介苗

B.百白破疫苗

C.脊灰疫苗

D.IPV疫苗
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