With technologies first researched and developed for space     1    , we can solve some of the big problems facing mankind, making our lives safer and easier. One of these is earthquake shock absorbers. Shock absorbers     2     applied to the space shuttle launch have also been set up in the cities with a high     3     of earthquakes in order to protect buildings and save lives. Some technologies need     4     research to better solve real-life problems. For example, liquid hydrogen is a clean     5     energy source that is used widely as rocket fuel, and it is     6     that hydrogen fuel cell vehicles will be mass-produced and     7     in the near future. These scientific and technological     8     can provide benefits to societies on the Earth in many areas     9     health, energy and information technology. This should be a strong     10     for continuing to explore space.

Besides such ethical concerns, the legal situations the autonomous vehicle industry is likely to be confronted with have     1     heated debates. In this emerging industry, manufacturing and programming standards are not yet     2    . Moreover, the quality and safety of the technology used in self-driving cars is still being challenged. This could lead to extraordinary cases like who should be held     3     when self-driving cars are involved in accidents — should it be the driver, the software programmer or the manufacturer? Manufacturing and programming standards first have to be agreed upon to make it possible for law courts to decide who is at fault when things go wrong. As     4     in autonomous vehicle design and technology are in progress, the final agreement on laws and regulations     5     this industry remains to be seen.

Our comfort foods are highly     1    . They vary from person to person, depending on our own unique experiences that have     2     our lives. If we grow up eating certain foods in our family, then those foods tend to be linked with positive     3    . For example, we often connect chicken soup with a happy childhood and its     4     becomes tied up with the feeling of being taken care of. When we eat it again, we     5     memories of a time when we were loved and looked after, and this cheers us up.

Of course, some advertisements are not so obvious: product placement is typically used in films with huge box-office success and TV shows with high     1    . Some films are now     2     by leading brands, so that only their products appear in the films, like the watches worn by the title character in the James Bond films. Other types of mass media use product placement too, including video games. It is not     3     for sports video game series to feature different in-game equipment with real brand names. We     4     these marketing messages without thinking about them too much,     5     they will probably have an effect on us the next time we go shopping.

With the quick spread of COVID-19, more and more people around us are tested p    1    and people grow more and more     2    (焦虑). Here are some effective measures to p    3    you from being infected(感染)with the virus.

First, wear masks wherever you go, though it is not c    4    for you to perform daily routine. Second, m     5    distance from others. It is of extreme importance to avoid direct c    6    with those who have fever, cough or other COVID-19 symptoms(症状). Third, eat properly to ensure you have enough     7    (营养). If you have to eat outside, bringing food from home is     8    (推荐). Last but not least, we should a    9    importance to rest and exercise, which can help you     10    (恢复)sooner if you should fall ill.

Given his personal experiences and the historical background, it is only natural to see that the     1     of Li Bai’s poems are characterized by the romantic style. Even the most uninformed reader would not fail to be impressed by the poet’s rich imagination. The moon and stars in the sky, the natural landscape and the figures in legends all become a vehicle for his imagination.     2     impressive is Li Bai’s free expression of strong feelings, which breathes     3     into the lifeless objects he describes, and which     4     him from other landscape poets. These features are     5     from Li Bai’s wide use of exaggeration, metaphor and other artistic techniques.

At the basic level,     1    intelligence is a branch of computer science that aims to create intelligent machines. One of the     2    aims of AI is to develop computer intelligence capable of learning from experience, adjusting to new     3    and performing tasks like humans. To achieve this aim, many approaches to creating true AI have been put forward, including “deep learning”, which enables a machine to improve its own performance by learning from the results of its previous actions. Deep-learning AI has the capacity to     4    massive amounts of data through multiple layers, imitating the complex     5    of the human brain.

Throughout history there have been many i    1     explorers both at home and abroad. Their great contributions to the world and good qualities are worthy of note. A    2     (显然), as senior high students, we are supposed to look up to them and view them as role models for lifetime.

Vasco da Gama, a Portuguese explorer, was considered the first European to reach India by sea. He d    3     from Europe and led the very first ships to sail non-stop to India. His experience makes me   c    4     (确信) that it is courage that helps overcome anything.

Ferdinand Magellan was also a great Portuguese explorer. He had such a natural c    5     about the unknown that he intended to search for a new route to the Spice Islands. The voyage, lasting from 1519 to 1522, confirmed the conception of the world as a     6     (球体).

Zheng He, who made a r    7     to explore the world at a very young age, was one of China’s greatest explorers. His seven voyages helped strengthen the h    8     relations between China and some neighboring and faraway countries and regions, exposing foreign people to Chinese culture. Nowadays Zheng He’s e    9     (杰出) accomplishments are widely     10     (承认) by Chinese people, and his life story is extremely encouraging.