甘露醇250ml要求30分钟滴完,每分钟应滴(滴系数按15滴/ml)
A.60滴B.80滴C.100滴D.125滴E.140滴
参考答案:D
在影像总模糊的因素中,最大模糊是
A.移动模糊B.几何模糊C.颗粒性模糊D.屏-片系统模糊E.冲洗加工模糊
It’s strange that they_____nothing about this matter.
A.know
B.would know
C.knows
D.knew