WhendoestheOnlinePlanningWorksheettoolrunavalidation？（）
A. Whenloadingandactivatingadefinitionfileintoaninactivecluster
B. Whenexportingadefinitiontoaclusternodeorsavingadefinitionfile
C. Whenimportingadefinitionfromanactiveclusterorsavingadefinitionfile
D. Whenloadingadefinitionintoanactiveclusterorsynchronizingadefinitionfile
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铁矿石中常见的有害杂质是硫、磷、砷以及铅、钾、纳等。（)
WhichofthefollowingconfigurationisvalidforexpansiondrawersonaPower750with2processorboard sinstalled？（）
A. 3PCI-eI/Odrawersand1PCI-XI/Odrawer
B. 4PCI-eI/Odrawersand4RIO-2I/Odrawers
C. 2PCI-eI/Odrawersand4PCI-xI/Odrawers
D. 4PCI-eI/Odrawersand2PCI-XI/Odrawers
预热烧结料的作用是用来提高料温，使其达到露点，改善料层的透气性。（)
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