A:115
B:66
C:49
D:164
Hello. I am Amy. I am eight years old. Today is my birthday. Look, I have a birthday cake. I have juice and rice for dinner. And I have many gifts, too. A red toy monkey, two new bags and five storybooks. I am so happy today.
如图所示的实验操作中正确的是( )
①规避国际贸易摩擦,扩大对外贸易
②提高开放型经济水平,促进资源优化配置
③形成全方位、宽领域、多层次的对外开放格局
④加快转变对外经济发展方式,促进外贸转型升级