单项选择题

Not until many years later______.
A、the whole truth became known
B、has the truth become known
C、the whole truth has become known
D、did the whole tmth become known

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计划成本法下，企业材料已收到并验收入库，但发票账单尚未收到，月份终了，应按（）暂估入账。
A、计划价格
B、估计价格
C、发票价格
D、出厂价格

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选择加氯点时，应根据( )、工艺流程和净化要求，可单独在滤后加氯，或同时在滤前和滤后加氯。

A．原水水质
B．消毒剂类别
C．水厂条件
D．所在地区