Different places have different foods. South Korea is a rich country in A____ Seoul (首尔) is its capital city. It was called Hanyang a long time ____ Tian'an is an important city in ____(west) South Korea. You can____(taste)many kinds of fruits, such as sweet pears and grapes there. You can also eat some delicious food,____ (especial)cold noodles and pickles(泡菜). In China, there is a lot of____(interest)food. For example, in Beijing, it is ____(truly) that you can eat Beijing Duck. It's a Chinese t____ .It ____(take)a lot of work. If you want to know more about food, you can go o____to fin it.

马克思和恩格斯创造的无产阶级的革命理论是（   ）

已知：如图，四边形ABCD是平行四边形，DE∥AC，交BC的延长线于点E，EF⊥AB于点F，求证：AD=CF．

科学的六步洗手法，90%左右沾污在手上的微生物都能洗干净．某校生物兴趣小组的同学利用盛有无菌培养基的培养装置（如图），设计了如下试验．请回答相关问题：

现代化建设进程中我们必须把保障和改善民生作为政府工作的出发点和落脚点，着力加强社会建设。下列选项中，体现政府加强社会建设的是（  ）

①发展老龄事业，改革养老保险制度        ②保障人民民主，维护国家长治久安

③理顺医药价格，保障群众病有所医        ④落实简政放权，促进政府职能转变