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当混凝土泵停泵时间超限时，不应排空管道。（)

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The National Office of the IRS issues private letter rulings and technical advice memoranda and these pronouncements are binding on the IRS.（)

A partner's basis is increased by the amount of deductible loss that flows through from the partnership.（)

发生事故时，应果断地按照现场规程的规定处理事故。调度的命令，除对人身、设备有直接危害外，均应坚决执行。（)

For any unrecovered portion of an annuity investment, the taxpayer is allowed a deduction in the year of death.（)