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写出相际传质速率方程
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Fill in the blanks with proper words given belowcorresponds, discrepancies, amendments, validity, urge1. Sometimes it is necessary to _____1______ the buyer to open the L/C.2. Once the seller has received the L/C, the first thing he should do is to check if it _____2____- with the agreement or contract.3. When _____3_____ or errors occur, the seller should require ______4_____ to be made accordingly.4. The L/C should have a time of _____5______, which generally last 15 to 20 days after the time of shipment
下列关于投影仪的描述中错误的是
下列关于投影仪的使用方法中正确的是
视频展台也被称为实物展台、实物演示仪、实物投影仪。
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