无损检验是一种不破坏、不损伤原结构的质量检验方法,主要包括(),()等。
参考答案:超声波探伤;X射线探伤
根据句意及汉语提示完成句子。
1. Jenny __________ (总是) eats a sandwich for breakfast.
2. Li Ming __________ (有时) goes to school by bicycle.
3. On __________ (星期六) we don't go to school.
4. I like to have my __________ (雨伞) on a rainy day.
5. Li Ming's home is __________ (远离) school.
焦油加工的主要任务是获得酚、萘、蒽等纯产品和()等粗产品。