问题
填空题
一个表面积50平方厘米的圆柱体，底面积是15平方厘米，把2个这样的圆柱体拼成一个大圆柱体，这个大圆柱体的表面积是______平方厘米．
答案
圆柱的侧面积：
50-15×2，
=50-30，
=20（平方厘米）；
大圆柱的表面积：50+20=70（平方厘米）；
答：这个大圆柱的表面积是70平方厘米．
故答案为：70．
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一个表面积50平方厘米的圆柱体，底面积是15平方厘米，把2个这样的圆柱体拼成一个大圆柱体，这个大圆柱体的表面积是______平方厘米．
圆柱的侧面积：
50-15×2，
=50-30，
=20（平方厘米）；
大圆柱的表面积：50+20=70（平方厘米）；
答：这个大圆柱的表面积是70平方厘米．
故答案为：70．
| 阅读理解。 | ||||
| Children in England mustn't work until they are 13. They need to have a work permit (许可) to start working.
| ||||
| 1.In England how old do children have to be before they can work? | ||||
[ ] | ||||
| A.15 B.14 C.10 D.13 | ||||
| 2.Paperboys and Papergirls deliver newspapers ______. | ||||
[ ] | ||||
| A.early in the morning B.at noon C.in the afternoon D.in the evening | ||||
| 3.Teenagers in England can do all of the following except ______. | ||||
[ ] | ||||
| A.work in an office B.work in a night club C.look after young children D.deliver newspapers | ||||
| 4.How many hours a week many teenagers work during the term time? | ||||
[ ] | ||||
| A.10 B.14 C.17 D.20 |