单选题
1分
A badly warped boiler water tube can be reworked and bent back into shape by _______. I. heating it ...
A badly warped boiler water tube can be reworked and bent back into shape by _______. I. heating it with a torch and reforming it with a soft mallet II. Cold pressing it back into shape with a hydraulic jack
参考答案: D
参考解析: 严重翘曲的锅炉水管通过I或II都不能再使用并弯回原来的形状。