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【单选题】
关于牙龈癌的叙述，哪项是错误的A.
多为鳞癌
B.
男性多于女性，以溃疡型最多见
C.
早期槽突及颌骨浸润，使骨质破坏
D.
下牙龈发病率高于上牙龈
E.
上牙龈癌比下牙龈癌淋巴结转移早
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【简答题】 Counter-offers are _______________ to the original offer. Once a counter-offer is made, the original offer shall be automatically ________________ .
【简答题】定义函数rect_perimeter,完成计算长方形周长功能。
【多选题】Which Two of the following statements describe the rules on acceptance of an offer?
A.
Once an offer has been accepted a contract comes into existence
B.
Acceptance can be inferred from the conduct of the parties
C.
Acceptance only takes place once it has been communicated to the offeror
D.
A counter-offer may constitute acceptance
【简答题】戴近视眼镜的人,眼睛看起来会比实际的小;戴远视眼镜的人,眼睛看起来会比实际的大。
【判断题】Once the counter-offer is made, the original offer is no longer valid, and the offeree now becomes the offeror as the counter-offer becomes the new offer.
A.
正确
B.
错误
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