单项选择题

A complete refining installation must include waste __ and water-treating equipment.

A．dismissal
B．survival
C．disposal
D．range
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单项选择题
When you’ve finished reading a book, and the pages are filled with your notes in the ____ , you know you read actively.
A．intervals
B．borders
C．margins
D．edges
单项选择题
A veteran employee can ___ his knowledge and skills to the next generation.
A．transform
B．translate
C．transfer
D．transport
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