精镗后在自检中如发现镗出的孔有锥度或比要求的基本尺寸略小0.01～0.03mm，一般不用合金镗刀重复进行精镗，而采用高速钢刀具补镗。
参考答案：对
— I hear that you failed the exam again. Why was that?
— I would really appreciate _________ you didn't mention this. [ ]
A. you if
B. it if
C. it when
D. that
以下是ICSH评价血细胞分析仪的方案，但不包括（）
A.可比性
B.灵敏度
C.准确性
D.线性范围
E.携带污染率
