作用在梁上的荷载向梁轴线简化,可以简化为 ________、__________、______
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对交换机/路由器远程配置时,需要满足什么前提条件？
Della bought a platinum ____________ for Jim to match his watch and Jim bought a set of _______ for Della. （）
Della was very happy before she bought Jim’s present.（）
Billy has used up the money that his mother gave him.（）
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