题目内容

Which of the following statements about errors is wrong?

A. Uncalibrated instrument will cause errors
B. Impure reagents will cause measurement errors
C. System errors can be eliminated by improving test methods
D. Random errors can be eliminated by improving test methods

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All errors can be eliminated by the proper methods.

Standard deviation can better reflect the closeness of analysis results.

The average value of a set of data is very close to the true value, indicating that the measurement is very accurate.

国外开来信用证规定，数量为1000公吨，散装货，不准分批装运，但未表明可否溢短装。根据《UCP600》规定，卖方发货的数量可增减5%以内。（）