在电火花加工前,应怎样进行模坯的准备?
参考答案:
下料—锻造—退火—外形加工—磨削基准面—钳工划线钻铰攻孔—热处理淬火回火—磨削上下平面—退磁—电火花加工。
A financial analyst could correct the current ratio in which a company uses the LIFO inventory valuation method to the FIFO method by:()
A. adding the LIFO reserve to the current liabilities.
B. adding the LIFO reserve to the current assets.
C. deducting the LIFO reserve from the current asset.
发热,肝区痛,阿米巴血清学检查阴性:()
A.诊断阿米巴肝病
B.排除阿米巴肝病
C.阿米巴原虫携带
D.肠阿米巴病慢性型
E.肠阿米巴病普通型