Dear Lily,

    How are you doing these days? I know your holiday is 1 week. You can come to Shanghai. Shanghai is very 2 and I always need (需要) a map here. Do you like 3 food? I can take you to 4 some great food. The 5 here are very good too. And you can 6 some good clothes. Do you know Disneyland (迪斯尼乐园)? I 7 it. It is a special world and it is 8 Let's go there. We can have great fun (乐趣) there. Oh, you don't need to take 9 clothes. You can come to my home to stay with me 10 wear my clothes.

    Yours,

    Daisy

已知cosα=-$\frac{4}{5}$，sinα=$\frac{3}{5}$那么角2α的终边所在的象限为（　　）

解方程．

1﹣20%x=1.6；            4：x=2：1.2；              5x﹣ $\frac{3}{4}$ x= $\frac{17}{29}$ ．

在复杂多样、变化万千的社会生活中，我们发现，人们需要遵守各种各样的规则。大家都遵守规则，社会生活才能安定有序。社会生活的规则有许多种类，他们在不同方面，不同的领域发挥着不同的作用，这些规则包括道德、法律、社会公共行为规则，团体章程、宗教教规等。