目前，中国已经步入老龄化社会，这使我国面临越来越大的社会保障方面压力，也使我国成为全球老龄产业市场潜力最大的国家。但我国老龄产业市场潜力并未完全释放，为此要（    ）

①进一步清除市场障碍→降低养老服务业准入门槛→推动养老服务业发展

②推动民间资本参与养老产业→确保资本回报率不断提高→激发民营企业活力

③降低养老服务业贷款利率→增强企业创新能力→提高企业的市场竞争力

④依靠现代信息技术→实现养老服务供需的有效对接→满足消费者个性化需求

    It's Saturday morning. My parents and I are on a tour bus. There are about twenty people on the bus. Some are from America, and some are from England and Australia. They are all our friends. We are going to the Great Wall. On the bus, there are two Chinese. One is a woman, the other is a man. The woman is good at English. She is talking with us about the Great Wall. The other people are listening to her. They like the Great Wall. They want to see it very much.

11-9=____ 12-9=____ 16-9=____

2+9=____ 3+9=____ 7+9=____