在感动中国人物的身上，既体现了中华民族的传统道德，又闪烁着新时代社会主义道德要求的光芒。这表明 
①道德总要随着时代的发展而被赋予新的内涵 
②文化传承必须通过道德典范来实现
③不同时期的道德典范总是带着不同时代的印记    
④社会主义思想道德体系与中华民族传统美德是相承接的 

—Where are you?
—________behind you.

2010年中国企业500强榜单9月4日在合肥揭晓。中国企业500强，前36位都是大型国有企业。总体来看，中国民营企业在500强中所占比例仅仅在三分之一左右。但如果看效益，民营企业无论在利润率，还是人均利润水平方面，都高于国企。这一现象说明了

阅读理解
B
    I went to Paris last August．I went there with my friend Jeff．We went by train．We stayed for five days in a small hotel in the center of Paris. The hotel was not expensive .Our room was OK—it was old，but very clean.
    In the mornings we visited all the famous tourist sights(著名的旅游景点)and museums．The Louvre Museum was my favorite ! We usually had some bread for lunch in a park．In the afternoons we walked around Paris．We took a lot of photos! And we had crepes! They were delicious! After a little sleep and a shower, in the evenings．We had dinner in small restaurants and then we went to pubs(酒吧)．We met very interesting people! We also made some good friends．
    We didn't buy any gifts．Everything was very expensive．But we sent(邮寄)very beautiful postcards(明信片)to our friends．We had a lot of fun ! It was an excellent holiday!
根据材料内容选择最佳答案。

人体中具有收缩和舒张功能的组织是（    ）。