问答题

8.       Les enfants ont leurs grandes vacances ______ été.

【参考答案】

en
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单项选择题
In AVS RS, suppose the number of tiers is 8, and the arrival rates of storage and retrieval transactions , are both 240 unit-loads h. The arrival rate of the storage transactions of the scenario, where the seized vehicle is not on the first tier and the requested storage position is not on the first tier, is [填空1].
不定项选择
A．正确 B．错误
A．正确
B．错误
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