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目前，我国采用的统一测量高程基准和坐标系统分别是（ ）。
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计算机病毒就是一段被损坏的代码。
杀毒软件和防火墙的功能是一致的。
The president congratulates freshmen on their _____1_______, and _____2_______ students of their facts that their current success was due to ________________3_______________ and their future is built on _______4________.
The text is _____1____ made by __________2__________ to ________3_________.
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