用户从私帐户变更为公帐户时，如果之前参加过个人预缴业务的，帐务变更时，营业前台应提示用户变更后预缴返充的钱将充入公帐户，被大家公用，用户确认后才能受理成功。
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对固体废物污染的控制，关键在于解决好废物的（）问题。
A. 减少保用
B. 处理
C. 处置
D. 综合利用
Cylinder linings constructed as an integral part of the block, are characterized by which of the following disadvantages?（）
A. They conduct heat poorly
B. They are expensive
C. They cannot be replaced
D. They require special tools for removal
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