信息分析对其所研究的对象来说具有()、评价、预测和反馈四项基本功能。
参考答案:整理
心盘平面裂纹未延及球面时焊修,焊前须(),焊修后须热处理并磨平。但外圆周裂纹长度大于周长的30%时更换
Nowadays people have to pass various tests for professional __________ so that they can be qualified for a well-paid job.
A.certificates
B.permission
C.admission
D.perseverance