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        A scientist working at her lab bench and a six-old baby playing with his food might seem to have little in common.After all,the scientist is engaged in serious research to uncover the very nature of the physical world,and the baby is,well, just playing…right? Perhaps,but some developmental psychologistshave argued that this“play”is  more like a scientific investigation than one might think.

Take a closerlookat the baby playing at the table.Each time the bowl of rice is pushed over the table edge,it falls in the ground—and, in the process, it belongs out important evidence about how physical objects interact ; bowls of rice do not flood in mid-sit, but require support to remain stable. It is likely that babies are not born knowing the basic fact of the universe; nor are they ever clearly taught it. Instead, babies may form an understanding of object support through repeated experiments and then build on this knowledge to learn even more about how objects interact. Though their ranges and tools differ, the baby's investigation and the scientist's experiment appear to share the same aim(to learn about the natural world ), overall approach (gathering direct evidence from the world), and logic (are my observations what I expected?).

Some psychologists suggest that young children learn about more than just the physical world in this way—that they investigate human psychology and the rules of language using similar means. For example, it may only be through repeated experiments, evidence gathering, and finally overturning a theory, that a baby will come to accept the idea that other people can have different views and desires from what he or she has. for example, unlike the child , Mommy actually doesn't like Dove chocolate.

Viewingchildhood development as a scientific investigation throws on how children learn ,but it also offers an inspiring look at science and scientists. Why do young children and scientists seem to be so much alike? Psychologists have suggested that science as an effort —the desire to explore, explain, and understand our world—is simply something that comes from our babyhood. Perhaps evolution provided human babies with curiosity and a natural drive to explain their worlds, and adult scientists simply make use of the same drive that served them as children. The same cognitive systems that make young children feel good about feel good about figuring something out may have been adopted by adult scientists. As some psychologists put it, ”It is not that children are little scientists but that scientists are big children.”

    Most animals on land are known to us, but many living things underwater are not. Now let's get to know some of them.

    Sea cucumber

    Sea cucumber are strange animals living at the bottom of the sea. They wear brown or white green coats. When summer comes, they stay deep to sleep because they are afraid of heat. And when it is autumn, they move to shallow (浅的) water and get their food.

    Pike

    The pike is a kind of freshwater fish. They are good swimmers and like swimming near boats, waiting to be fed. They have sharp teeth to catch fishes. When they are young, they live in groups. However, when they grow up, they prefer to live alone.

    Cuttlefish

    A cuttlefish can swim quite fast, so it is also called rocket (火箭) fish. It has eight arms and two feelers on its head, just around its mouth. It ejects ink (喷墨) when it is in danger. Its meat is delicious, and it is often the first choice for many people.

    Octopus

    An octopus has long arms, with which to catch food and protect itself. When it is sleeping, one or two of its arms are still on duty, keeping moving. Once it feels something dangerous, it can wake up at once to take action.

    Language is always changing. In a society where life continues year after year with few changes, the language does not change either. The earliest known languages had difficult grammar but a small, limited vocabulary. Over the century, the grammar changed, and the vocabulary grew. For example, the English and Spanish people who came to America during the sixteenth century gave names to all the new plants and animals they found. In this way, hundreds of new words were introduced into English and Spanish vocabularies. Today life is changing very fast, and language is changing fast too.

     There are several major(主要) language families in the world. Some scientists say there are nine main families, but other scientists divide them differently. The languages in each family are connected, and scientists think that they came from the same parent language. About 3 percent of the people in the world speak languages that are not in these major families.

    Passenger Information

    Carry-on Bag Rules

    When travelling on China Southern planes, we ask our customers to follow our simple bag rules.

    Each passenger is allowed to bring one bag onto the plane.

    Weight limit: Each carry-on bag may weigh up to 10 kilos.

    Size limit: Each carry-on bag can be up to 110cm long, 60cm high and 30cm wide.

    Additional bags and oversized/overweight bags may be allowed on the plane if there is enough room. There will be a fee for such bags (see the table below). Please note that if your bag breaks more than one rule then you must pay a fee for each rule broken.

    Safety Rules

    For the safety of our passengers, the following items must not be taken onto the plane:

    Bottles containing gas (e.g. cigarette lighter)

    Bottles containing any cream, oil or other liquid that are over 100ml.

    Note:

    If you have any liquid medicines over 100ml that you must use during your flight, please contact our customer service manager on 34533566 to make arrangements at least 24 hours before your departure. You will need to have a doctor's letter explaining why you need the medicine.

    Bag Fees

    No bag over 15 kilos will be allowed on the plane. **No bag over 150cm long or 80cm high may be taken on the plane. Passengers must put such bags in the plane's storage.

    From Madrid to Buenos Aires to Panama City to Lisbon, President Xi Jinping has tirelessly promoted the building of a community of shared future for mankind, and the Belt and Road Initiative (倡议) as a means to achieve that.

    But all don't see it that way. While some are quick to see its positive potentials, other countries insist on viewing it skeptically. There have been the usual doubts about the intention behind, although the mysterious threat they speak of is one they seem unable to explain clearly.

    To some of them, it is a vague assumption that investments from China are potential “debt traps” that call for extreme caution or “threats to national security”. That is why the business combinations involving Chinese companies which would be mutually (相互地) beneficial have hit the rocks. The Chinese telecommunications technology giant Huawei, for instance, has found the doors to the 5G telecommunications markets of advanced countries closed to it on “national security” grounds. Likewise, the European Union has agreed on a framework regulating foreign investment (投资), particularly those from China on the same account.

    Even as Chinese and Portuguese leaders discuss bilateral (双边的) cooperation under the Belt and Road, there is no lack of concern about “China's influence”, But existing EU rules do not forbid Lisbon from seeking such a partnership. If Lisbon sees no harm from foreign investment, no outsider is in a position to prevent it from making a choice in its own best interests.

    Portuguese Prime Minister Antonio Costa has reminded EU decision-makers of his country's desire for foreign investment, and advised the latter to avoid taking “the path of protectionism”. It was a timely reminder.

    Faring the challenges in today's world, China and the countries that have embraced the Belt and Road are convinced it is the way to common development and the world's lasting peace and stability.

    Over the past 40 years, China has helped more than 700 million rural residents out of being poor, and the poverty rate(贫困率) — the proportion of people living below the Chinese poverty line — had fallen among the rural population from 97.5 percent in 1978 to 3.1 percent at the end of 2017, official figures shows. China's achievements in poverty alleviation(扶贫) made the world look at China with admiration.

    "For me, it is unbelievable that over 40 years, that is, over the course of one working lifetime, China has gone from one of the poorest countries in the world to one that is about to eliminate(消除) absolute poverty," said Craig Allen, president of the US-China Business Council.

    Varaprasad Sekhar Dolla, a professor of Chinese studies at India's Jawaharlal Nehru University, also spoke highly of China's achievements in poverty reduction. "If global poverty came down greatly in the last three or four decades, it's partly because of the Chinese contribution to reducing poverty within its own national boundaries," said the Indian scholar.

    In the eyes of Khairy Tourk, a professor of economics with the Stuart School of Business at the Illinois Institute of Technology in Chicago, "many countries look up to China to learn from its experience." "The Chinese experience is based on building a modern infrastructure(基础设施) and then on setting up special economic zones that would help underdeveloped countries to become more industrial," he added.

    In the government work report delivered at the opening of the annual NPC session (全国人大会议) on March 5, China promises to reduce its population of rural poor by over 10 million this year.