①贴近现实生活的文化作品更能唤起人们的共鸣

②中华传统文化对中国人的价值观产生积极影响

③中华文化有求同存异和兼收并蓄的包容性特征

④优秀文化蕴含的健康有益内容能为大众所接受

工业上制造镁粉是将镁蒸气在气体中冷却．可作为冷却气体的是（　　）

①空气    ②CO₂      ③Ar     ④H₂      ⑤N₂．

阅读下列短文，按要求完成各题。  

    One day an American called Simon went to London to visit his friend, Rick. Rick told him that his flat was on the first floor. When he arrived, Simon went straight to the first floor of the building. But he was told that there was no Rick on that floor. Do you know why?

    In fact, the British call the first floor of a building the ground floor. The floor above the ground floor is the first floor, which Americans would call the second floor.

The story shows that there are a few culture differences between Britain and America, though the British and Americans both speak English. The British usually hide their feelings. They seldom start a conversation with strangers. For example, on the train the British often spend their time reading newspapers or books. But Americans are quite different. They're more active and easier to talk with.

    The British and Americans may use different terms for many things. The British usually use football, eraser and mail while Americans prefer to use soccer, rubber and post.

   A plant makes its own food in its leaves . Water comes to the leaves through the roots . Air gets into the leaves through very small holes . The green coloring in the leaves uses the water and air to make the food for the plant . It also needs sunshine because a plant can make food only when the sun is shining.
   Animals and people could not live without green plants . They both eat plants . People and some animals also eat the meat of some animals and these animals eat plant