液相色谱仪检测是通过什么进行定性的()。
A、压力
B、流速
C、保留时间
D、峰面积
参考答案:C
Declaration documents, import and export documents, contracts and other data directly related to import and export transactions shall be retained for ______ effective from the date of release of import and export goods.
A. one year B. two years C. three years D. four years
编制利润表主要是依据()。
A、资产、负债及所有者类各账户的本期发生额
B、损益类各账户的期末余额
C、损益类各账户的本期发生额
D、资产、负债及所有者权益类各账户的期末余额