问题
单项选择题 A1型题
放射性自显影的基本原理是（）
A.利用感光材料能使射线感光
B.射线使感光材料变色
C.利用射线能使感光材料感光
D.组织样品能吸收射线
E.射线能通过组织样品
答案
参考答案：C
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放射性自显影的基本原理是（）
A.利用感光材料能使射线感光
B.射线使感光材料变色
C.利用射线能使感光材料感光
D.组织样品能吸收射线
E.射线能通过组织样品
参考答案：C
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| When describing people, we often use the three common words: men, women, children. ___1_ of us agree that boys and girls should have __2__ rights. But in almost every society in the __3__, girls are treated less well than boys. __4__, people paid little attention to differences __5__ boys and girls and the ways in _6__ they were treated. However, recent research __7__ that girls receive less attention than boys in matter __8__ as schooling, health, jobs and earnings. __9__ girls were valued and treated as well as boys, there would be _10__ another 100 million women in the world. In___11_ countries of the world, girls live with families __12__ whom they work as servants. They _13___ twelve hours a day, often receive no__14__, have no bedroom of their own and are not __15__ to run away. Why doe this happen? The __16__ is that poor families who live in the country __17__ not be able to have enough food for all their children. So girls are ___18___ to families in towns to work __19__ servants. In Haiti there are 109,000 children, __20__ girls, aged 5-18 who live with rich families and work for nothing. | ||||
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