右图为上海世博会吉祥物“海宝”毛绒玩具。请回答：
I w____ to Qingdao with my parents last summer holiday. We t____a plane there. We went to the beach. It was very b ____. I like swimming very much. I s____in the sea. My mum took many p____ there. We had a good time.
①旨在保护环境，引导绿色消费 ②能增加企业利润，提高企业竞争力
③能发挥价格杠杆的作用，增加汽车销量 ④促进新能源的开发与利用，增强可持续发展能力
15～18世纪是欧美主要国家出现社会巨变的时代。这里的“社会巨变”主要是指（ ）
下列动物不具有膈的是（ ）
