***曾在会晤奥巴马时强调，要将亚太经合组织打造成推进一体化的制度平台、反对贸易保护主义的开放平台。任何一个国家对进口产品采取的贸易限制措施，往往是损人不利己的。这给我们的启示有(　　)

①各国应致力于维护国家间的共同利益

②在国际交往中要坚定地维护本国利益

③要在共同利益的基础上寻求合作

④在维护自身利益时也要尊重他国合理利益

阅读理解

    Hundreds of years ago，a Roman army came north from England to make war on Scotland. The Scots，a brave people，loved their country very much. They fought hard to drive the enemy out of Scotland，but there were too many Romans. It looked as if the Romans would win.

    One night，the leader of Scots marched his soldiers to the top of a hill. "We will rest here tonight，my men,” he said. "Tomorrow we will fight one more battle. We must win or we will die."

    They were all very tired，so they ate their supper quickly and fell asleep. There were four guards on duty, but they were very tired as well and also fell asleep one by one.

    The Romans were not asleep. Quickly they gathered at the foot of the hill. Slowly they climbed up the hillside, taking care not to make a sound. Closer and closer they came to the sleeping Scots. They were almost at the top. A few minutes more，the war would be over. Suddenly，one of them put his foot on a thistle(蓟). He cried out and his sudden cry woke the Scots. In a moment，they were on their feet and ready for battle. The fighting was hard but it did not last long. The Scots wiped out the Romans and saved their country.

    The thistle is not a beautiful plant. It has sharp needles all over it. Few people like it. But the people of Scotland liked it so much that they made it their national flower.

根据短文内容，选择最佳答案，并将选定答案的字母标号填在题前括号内。

下图是关于近代以来主要资本主义国家主流经济理论影响力演变曲线图，读图完成下列要求。

指出曲线A．  B．分别代表的经济理论并描述曲线A．  B．影响力的演变历程。