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
