铣床上装卸铣刀时应用手握住铣刀刃,将刀柄装入主轴。
参考答案:错
When you read English,_____ translate every word into Chinese.
A.try not to
B.try to
C.don’t try
D.not try
最小成本分析的简写是()
A.CMA
B.CBA
C.CEA
D.CUA
E.CDA