燃气管道更新修复技术主要有（）
A.裂管法
B.穿插内衬法
C.挤压穿插法
D.翻转内衬
E.补焊法
参考答案：A, B, C, D
解析：
燃气管道更新修复技术主要有：
（1）裂管法修复技术；
（2）管道穿插技术；
（3）翻转内衬法修复技术。其中，裂管法又称胀管法、碎管法或爆管法，其原理是用一组割刀轮将原旧管道切开并胀扩后，回拉带入一根同管径或大一级的新管，以达到替换旧管道或扩容的目的。
管道穿插技术根据穿插管的口径可分为异径非开挖穿插（穿插内衬法）以及挤压穿插技术。
翻转内衬修复技术又称CIPP原位固化法，作为管道非开挖修复技术的一种，仅需在路面开挖工作坑就可以在原地原位使旧管道得到重建和更新，且其施工原理先进、选材合理、适用范围广。
Winter is a very special time in Northern Norway. Winter also means skiing, and Narvik can offer some of the best skiing in Norway. The view and light change frequently and no two days are the same. For many people, the northern lights are an unforgettable sight, and in Narvik the sky is especially clear and great for watching at night. The tourist season lasts from February to April, although May can be fascinating too, often with fantastic dry snow and an unbelievable light lasting well into the evening. Ski hire It is possible for adults and children to hire skiing equipment such as snowboards. All equipment is prepared for us. If you would like to book your equipment, please email Narvikfjellet. Cross-country skiing There are 12 kilometers of cross country ski run in Narvik. You need to bring your own skis as there is no cross-country hire. However, equipment can be bought at local sports shops in and around Narvik. Off-piste skiing（非场地滑雪） In order to explore Narvik’s off-piste opportunities you need to know the dangers when choosing routes. It is suggested that you bring necessary equipment such as a shovel（雪铲）and a GPS locator. Ask Narvikfjellet for an experienced guide. With a guide you can explore Narvik’s special off-piste areas in a safe manner. Sometimes it is nice to do something different and not everybody enjoys skiing. Then you can go horse-riding, or visit the local museums. Price examples for the 2012--2013 season
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