为确保窝和孔()划窝通常以孔为基准,用()划窝。
参考答案:同轴度;带倒杆的划钻
—What’s your favorite sport?
—Swimming. I think it’s _______.
[ ]
A. easier
B. more difficult
C. the most interesting
D. the most boring
单采粒细胞有关红细胞混入量的质量标准要求,血细胞的比容为()。
A.≤0.15/袋
B.≤0.17/袋
C.≤0.18/袋
D.≤0.20/袋
E.≤0.25/袋