[背景材料]
某施工单位承接了一项二级公路路基工程项目。该公路K21+100～K41+100路段以填方为主，合同段附近地表土主要是高液限黏土，在较远地带则分布着含草皮土、强膨胀土、腐殖质土、盐渍土、有机质土、粉土、砂性土等。出于对造价控制的考虑，业主要求就地取材。为此，施工单位针对高液限黏土填筑路堤做了试验路段，以确定其最大干密度和松铺厚度等措施。
在填筑过程中，施工单位发现其存在一些质量缺陷，并及时确定了质量缺陷的性质，同时采取了应对的措施。
土方路基施工完成后，施工单位实测了压实度、弯沉值、平整度、宽度和边坡，各项指标均满足相应规范要求，施工单位提请监理验收。
[问题]
工程质量缺陷性质的确定方法有哪些
参考答案：质量缺陷性质的确定方法有3种：(1)观察和查阅记录资料；(2)检验与试验；(3)专题调研。
| 补全对话。 | |
| A: You're in Grade Nine now. Is your life quite different? B: Yes, 1 But now I have to get up at six to read English. A: When did you go to bed? B: About nine. But I have to stay up until eleven. A: 2 B: Yes, but my study takes all my time at present. A: What's your favorite sport? B: I like basketball. 3 But I have no time to play with my friends now. A: What about your weekend? B: I used to watch TV and read some books I like, 4 A: Did you used to join the club after school? B: Yes, 5 A: Thank you for telling me ! B: You're welcome.
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