试剂和器皿带进杂质所造成的误差可用()消除。
A、对照试验
B、空白试验
C、校正试验
参考答案:B
---What else do you want?
--- else. I think I have got everything ready.
A.Something
B.Nothing
C.Anything
D.Everything
笛卡尔确信可以得到真的知识。