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终聚釜搅拌器机封通入EG的作用有哪些？

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题目：

终聚釜搅拌器机封通入EG的作用有哪些？

答案：

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( )1. A. happy       
( )2. A. success     
( )3. A. wear        
( )4. A. made up     
( )5. A. method      
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D. would              
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D. protect            
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