问题
填空题
一个直棱柱有7个面，则它有______个顶点，______条棱，表面上至少有______个直角．
答案
因为是五棱柱．
故有10个顶点，15条棱，表面上至少有20个直角．
故答案为10，15，20．
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一个直棱柱有7个面，则它有______个顶点，______条棱，表面上至少有______个直角．
因为是五棱柱．
故有10个顶点，15条棱，表面上至少有20个直角．
故答案为10，15，20．
I work in a small 1 . It is near an English school. Every day many students come to 2 things. In the morning, I get up at six, and then I 3 my breakfast. I go to work 4 . I get to the shop at about six fifty. The shop 5 at seven. We sell things 6 food and drink. We have school 7 , too. There 8 often many people in our shop from morning to evening. I have lunch in the shop. At seven in the evening the shop is 9 . All of 10 go home for supper.
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