"Using firm contracts in uncertain situations carries significant commercial risks," says Albert Sanchez-Graells, a professor at the University of Bristol Law School who has been researching NHS contracts for more than 15 years.
（二）原值超过500万元的单项长期资产，购进时先全额抵扣进项税额，此后在用于混合用途期间，根据调整年限计算五类不允许抵扣项目对应的不得从销项税额中抵扣的进项税额，逐年调整。
，详情可参考safew官方下载
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let value = value in threshold matrix at (x, y)