操作耙装机的安全距离为多少?
参考答案:
司机操作一侧至巷壁的距离必须保持在700mm以上。严禁在耙斗运行范围内有人。
用于自身免疫溶血性贫血诊断的试验是()
A.冷热溶血试验
B.Coombs试验
C.osmotic fragility test
D.高铁血红蛋白还原试验
E.热变性试验
You think you are clever,____, I assure you that you are very foolish.
A.on the contrary
B.on the other side
C.in other words
D.on the whole