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浮岩（pumice）
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考题
设计任务：请阅读下面学生信息和语言素材，设计一节课的教学方案。教案没有固定格?
式．但须包含下列要点：?
teaching objectives
teaching contents
key and difficult points
major steps and time allocation
activities and iustifications
教学时间：45分钟?
学生概况：某城镇普通中学高一年级第一学期学生，班级人数40人。多数学生达到《普通高中英语课程标准(实验)》五级水平。学生课堂参与度一般。
语言素材：?
Pompeii: The facts
August 24, in the year AD 79, began normally for the people in Pompeii, a town at the foot of Mount Vesuvius. Farmers went out to their fields, shopkeepers set out their goods for sale,craftspeople opened their workshops and the rich walked to the public baths while their servants cleaned their houses and washed their clothes. Unfortunately, the end of the day was far from normal for the 20,000 citizens of Pompeii.
Early in the afternoon, when many people were resting from the heat of the day, Mount
Vesuvius erupted. Millions of tonnes of ash, lava and pumice poured onto the surrounding hillside and over the town of Pompeii and other towns and villages. By evening Pompeii was buried under 3-5 meters of ash and mud, and at least 2,000 men, women and children were buried with their town.
考题
泥浆钻进时下述说法中（）不正确。（）A、泥皮具有保持孔壁的作用，泥皮越厚，性能越好B、泥浆具有护壁、堵漏的功能C、泥浆静切力越大，悬浮岩粉能力越强，不易漏失D、泥浆中加入石灰岩粉等物质时，泥浆的黏度增加，静切力增加
考题
单选题泥浆钻进时下述说法中（）不正确。（）A
泥皮具有保持孔壁的作用，泥皮越厚，性能越好B
泥浆具有护壁、堵漏的功能C
泥浆静切力越大，悬浮岩粉能力越强，不易漏失D
泥浆中加入石灰岩粉等物质时，泥浆的黏度增加，静切力增加
考题
判断题普通型研磨剂中的磨擦材料一般都是坚固的浮岩。A
对B
错
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