未分类题

建筑石膏与其他胶凝材料比，其特点是()

A.凝结硬化快
B.空隙率大，表观密度大
C.强度较低，具有一定的调湿性
D.防火性差，耐火性好


【参考答案】

A,C
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听力原文：M: Hi, Sherril.W: Hello, Fill, how are you?M: I'm fine, where are you headed?W: Oh, I' m on my way home from work.M: I didn’t know you had a job.W: Ya, I work part-time at the supermarket.M: What do you do there?W: I work in the produce section, trimming and wrapping fresh fruit and vegetables. I also stock shelves. Sometimes when it really gets busy, I work at the check-ont counter. Have you got a job, Fill?M: Ya, I do yard work for people. Your know, cutting grass, raking leave and falling weeds, things like that.W: I' d like doing that. It must be nice to work outdoors.M: Sometimes it is, except when it rains, or snows or gets too hot or too cold.W: I guess every job has its drawbacks. 'There are times when I get pretty tired of carrying things around at my job. But a job is a job. Got to earn money for school.M: Me too, tuition sure is high, isn't it? Well, I'd better get going. I have to plant some trees for my neighbors this afternoon.W: Well, don’t work too hard, holding down a job, going to class, studying, sometimes can become too much for one person. Take it easy.M: You too, it was great seeing you, Sherrill.Where was Sberrill going when Fill met her?A．To the supermarket.B．To school.C．To her home.D．To work outdoors.
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单项选择题
典型事例法的缺点是( )。
A.直接描述人们在工作中的具体活动
B．收集归纳事例并且把它们分类,需耗费大量时间
C．这种方法获得的资料适应于大部分工作
D．事例法所描述的具有代表性
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