Science in Higher Education

Can you be clear?

It is an evergreen tree of the Sycamore family, about 12 meters high. The leaves are 20-30 cm long and oblong-elliptic.

Long before Columbus discovered the Americas, the inhabitants of tropical Mesoamerica, especially the Mayans and Aztecs, knew the uses of the cacao bean. Not only did they make cocoa beans into drinks, but they also used them as a medium of exchange.

In the 16th century, cocoa beans were introduced to Europe and refined into cocoa powder and chocolate; Cocoa butter is also extracted. Cocoa trees are found in the humid lowlands of the tropics and are commonly found in the shade of tall trees. The trunk is solid, up to 12 meters high, the leaves are oval, leathery, up to 30 cm long, and the branches and leaves stretch like an umbrella canopy.

The flowers are pink, small and smelly, and grow directly on the branches. The fruit is oblong and hangs from the stem like a rugby ball when ripe. The seeds are highly nutritious, containing a lot of protein, fat, starch and a small amount of theobromine, which can be ground into powder.

Cocoa powder has a fragrant and slightly bitter taste, has a special flavor, and is one of the three major non-alcoholic beverages along with tea and coffee. Cocoa powder is also the raw material for making chocolate, cocoa pulp can be used as feed, and seeds can also be used to extract oil, which is very valuable.

"Thinking" is a kind of thinking activity of people, and it can best reflect the wisdom of people. The "thinking" of the computer is just some simulation of the thinking process of the human brain. When people think consciously, they always have to base themselves on a certain amount of knowledge.

In order to make the computer have knowledge, it is first necessary to solve the problem of how to represent the knowledge in a form that the computer can accept, store, retrieve, use and modify, and organize and manage the stored knowledge in an effective way. The "thinking" process of a computer is actually a method of symbolic computing to simulate the thinking of the human brain. This process is a process in which a computer engineer designs a program and converts it into instructions that the computer executes in turn.

However, the human brain is developing, and computers are made by people, and from this point of view, computers can only partially replace the human brain, but cannot completely replace the human brain.

The first mechanical computer.

In 1834, Charles Babbage built a massive mechanically powered "analysis engine", the first mechanical computer. It is as big as a bus and can store and retrieve computational information in memory. Babbage spent 40 years building this machine, but it was not entirely successful, because the tools and materials of that era were not as advanced as the inventions of his genius.

Because it contains a certain substance that reacts with hemoglobin in the blood. Produces lethal substances.

In 138 BC, in order to unite the Dayue clan to deal with the Xiongnu, Emperor Wu of the Han Dynasty appointed Zhang Qian as a special envoy and led a delegation of more than 100 people to the Western Regions. However, soon after Zhang Qian's delegation left Yangguan, he was arrested by the Xiongnu. Zhang Qian was imprisoned for ten years, and he finally escaped and reached the kingdom of the Great Moon Clan.

However, the Da Yue clan no longer wanted to fight the Xiongnu. Zhang Qian had no choice but to come from the Great Moon Kingdom to the Great Xia Kingdom (present-day Afghanistan).

When returning from Daxia, Zhang Qian crossed Xinjiang and Gansu from the northern foot of Kunlun Mountain, and finally returned to Chang'an. Zhang Qian's mission to the Western Regions, although he did not achieve the goal of uniting the Dayue clan, opened up a boring and chaotic trade road to the Western Regions. Emperor Wu of the Han Dynasty was very pleased with this and named him "Marquis of Bowang".

In 119 BC, Zhang Qian made a second mission to the Western Regions. The trade route opened up by Zhang Qian from Chang'an to the countries of the Western Regions has also become an important route connecting Eastern and Western cultures, and people call it the "Silk Road".

The ink in the squid's body is usually stored in the ink sac in the stomach, which is a powerful "self-defense". When attacked by an enemy, it will spew a stream of ink from its ink sac, staining the surrounding sea water black, but it will take the opportunity to escape. In addition, the squid's ink contains toxins, which can be used to anesthetize enemies.

The cavity of ink stored in the squid sac takes a long time to form. Therefore, Shouzai, not at the critical moment of last resort, will not cast "ink" at will.

The largest squid.

The body of the king squid is generally only 30 to 50 cm, but the largest king squid can grow up to 21 meters or even longer, weighing up to 2000 kg. Their eyes are surprisingly large, reaching a diameter of about 5 centimeters; The diameter of the suction cup is also more than 8 cm.