问题：
[单选题](单选题) 一台测温仪表,其测温范围为600 ~ 100 ℃, 已知其最大绝对误差± 6 ℃, 则其精确等级为（ ）。
A、 1.0级
B、 1.5级
C、 1.2级
D、 2.5级
参考答案：
B
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