在中，三边与面积的关系式为，则角为（   ）

“当前党和人民的主要任务是集中力量发展社会生产力，实现国家工业化，逐步满足人民日益增长的物质和文化需要”。提出这一重要论述的会议是（    ）

完形填空。

    Mary is worried about her 16-year-old daughter，Sophia．One day，Sophia comes back from a party，upset and unhappy．From then on，she  1  nothing but how to lose weight and become beautiful．She refuses to eat and keeps on2exercise．Sophia has always been a little heavy，so Mary encourages her to go on a diet．She feels that her daughter would  3  more attractive(有吸引力的)if she lost 5 kilograms．However，Sophia has lost over 10 kilograms until now．Her eating and exercising habits are having a harmful effect(影响)on her  4．She is too thin and is often sick．

    Her mother is trying to prevent her from going on a diet and  5 weight，but Sophia thinks that she is still too heavy and refuses to start eating as  6．Sophia's mind is full of the idea of looking like a model. Every day she goes to a club to do exercise．Sometimes she 7 her time reading magazines like Fashion&Beauty．The models in these magazines are very thin and beautiful．Sophia says “If I look like these models. I will be happy and the boys will like me．”

    Mary feels sorry for having encouraged her at first，because Sophia 8 feels good or pleased with her body．She's afraid that Sophia will never be happy  9 she always compares herself with the models in the magazines．Mary tries to tell Sophia that true 10  comes from the heart．The most ordinary face becomes beautiful when the person is filled with confidence．

某商场将一件玩具按进价提高60%后标价，销售时按标价打折销售，结果相对于进价仍获利20%，则这件玩具销售时打的折扣是（　　）