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1 . 在空间直角坐标系
中,
,若四边形
为平行四边形,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8de4f21010a032a41d88d31f930fadd.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a834024400d0730af3e640ca4d5f54b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/396a9f993299ff7ac9684ec7d775e06e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8de4f21010a032a41d88d31f930fadd.png)
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2023-09-07更新
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5卷引用:青海省海东市第一中学2023-2024学年高二上学期第一次月考数学试题