问题
单项选择题
土内含水愈多，则()。
A．内摩阻力增加
B．抗剪强度增加
C．内剪应力增加
D．内聚力增加
答案
参考答案：C
解析：土内含水愈多，湿化程度增高，使土壤颗粒之间产生润滑作用，内摩阻力和内聚力均降低。其土的抗剪强度降低，边坡容易失去稳定。同时含水量增加，使土的自重增加，裂缝中产生静水压力，增加了土体内剪应力。
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土内含水愈多，则()。
A．内摩阻力增加
B．抗剪强度增加
C．内剪应力增加
D．内聚力增加
参考答案：C
解析：土内含水愈多，湿化程度增高，使土壤颗粒之间产生润滑作用，内摩阻力和内聚力均降低。其土的抗剪强度降低，边坡容易失去稳定。同时含水量增加，使土的自重增加，裂缝中产生静水压力，增加了土体内剪应力。
| 根据对话内容，从题后方框内所给的ABCDEFG七个选项中选出5个，使对话完整，符合逻辑，句意正确，将答案写在题号后的括号内。 | |
| (A student meets his English teacher at the station after the summer holidays begin) S: Hello, Miss Li How are you? T: Oh, fine, thank you. 1.________. And how are you and your parents? S: We're all very well, too,Thanks. T: 2.________? S: My parents and I are going to see my grandparents in Shanghai. T: Are you? I'm going to Beidaihe. All the teachers are going. S: 3.________? T: For a week. S: We're coming back in a week, too. 4.________. T: Thank you. Have a good trip, There goes the bell. 5.________. Goodbye. S: Bye.
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