下列四种气候类型中，属于亚热带的气候类型是（ ） A． B． C． D．

已知△ABC的三边a，b，c和面积S满足S=a²-（b-c）²，且b+c=8．

（1）求cosA；

（2）求S的最大值．

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Here are some ways to help you have a happier and more successful life:

小题1:Instead of saying, “Why is this happening to me?” you say, “What can I learn from this?” Trust that anything difficult in life is temporary. Then life will get better. 小题2:Without life’s challenges, we would never know what we are truly made of. Therefore, we become stronger and more confident in the process.

小题3:It actually works! Don’t say it doesn’t work until you’ve tried it. We all have a blueprint for our lives and making plans will help us realize it.

Take care of people around you honestly. 小题4:If you truly care about your friends, family or someone else, they’ll stick with you through high and low because they know you care about them.

Refuse to compare your progress with others. It will only serve to destroy your confidence. Everyone is at different stages in their lives. If you understand that you’re right where you’re supposed to be, then it won’t matter what others are doing. You are unique with special qualities, talents, skills and so on. 小题5:

1. Pay attention to your imagination.
2. The power of making plans cannot be ignored.
3. Try to learn from the difficult situations you meet.
4. Everything you’ve experienced has been in preparation.
5. There is no one like you, so how can you compare yourself to others?
6. It is through the toughest times we learn what we’re capable of doing.

G. People can see right through you and can feel whether you’re honest or not.

2013年6月13日，“神舟十号”和“天宫一号”成功实现自动交会对接．“天宫一号”资源舱舱段使用了铝﹣锂合金代替传统材料，铝﹣锂合金属于（　　）

A．混合物

B．纯净物

C．单质

D．化合物

依法必须进行招标的项目，自招标文件开始发出之日起至投标人提交投标文件截止之日起，最短不少于 ( )日。

A．5

B．10

C．15

D．20

列举影响体育产品需求量的4个主要因素。