单项选择题
甲.乙.丙.丁测定同一试样中的含铁量(真实值37.40%),四人四次的测定结果分别为:
甲:37.38%,37.42%,37.47%,37.50%
乙:37.21%,37.25%,37.28%,37.32%
丙:36.10%,36.40%,36.50%,36.64%
丁:36.70%,37.10%,37.50%,37.90%。
上述结果准确度和精确度均好,结果可靠的是()
A.甲
B.乙
C.丙
D.丁
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单项选择题