材料一：“没有共产党就没有新中国，没有共产党就没有新中国，共产党辛劳为人民，共产党一心救中国，她指給了人民解放的道路，她领导中国走向光明，她坚持抗战八年多，改善了人民生活，她建立了敌后根据地，她实行了民主好处多。没有共产党，就没有新中国。”

材料二：改变生产资料私有制为社会主义公有制这个极其复杂和困难的历史任务，现在在我国已经基本完成了。我国社会主义和资本主义谁战胜谁的问题，现在已经解决了。

——刘少奇

Different countries have different customs. When you travel to another countries，please follow their customs，just as the saying goes，“             .”Very often people who travel to the United States forget to tip（付小费）.It is usual to tip porters who help carry your bags，taxi drivers and waiters. Waiters expect to get a 15% tip on the cost of your meal. Taxi drivers expect about the same amount.
In England，make sure to stand in line even if there are only two of you. It's important to respect lines there. It’s a good idea to talk about the weather. It's a favorite subject of conversation with the British.
   In Spain，it's a good idea to have a light meal in the afternoon if someone invites you for dinner. People have dinner very late，and restaurants do not generally open until after 9 pm.
   In Arab countries，men kiss one another on the cheek（脸颊）. Your host may welcome you with a kiss on both cheeks. It is polite for you to do the same.
   In Japan，people usually give personal or business cards to each other when they meet for the first time. When a person gives you a card，don't put it into your pocket right away. The person expects you to read it.Don't forget to be careful of your body language to express something In conversation. A kind of body language that is acceptable in one culture may be impolite in another.

如图是染色体及构成染色体的DNA、蛋白质、基因之间的关系示意图，正确的是（  ）