How tough is the crucible? Even molten steel at over a thousand degrees Celsius cannot melt it. What material is the crucible made of
A crucible is a container used to melt materials such as metals and ceramics. Crucibles play an important role in industrial production, especially in fields such as metallurgy, chemistry, and oil refining...
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32 years ago, American scientists conducted an experiment where four men and four women lived in the same room for two years. What were the results?
In the 1960s, the Americans had successfully ventured into space and sent humans to the moon. In addition, the space hegemony between the United States and the Soviet Union was very serious at that time, and the Americans began to make bold ideas in order to rank higher than the Soviet Union:Can we directly create an ecological base on an outer planet in space where humans can live?With the proposal of this plan, the Americans began the experiment with great fanfare, with four male and four female participants,So what exactly is the result? Is it what people say gave birth to a football team or was the experiment successful?Experimental planThrough many years of exploration and experience accumulation, American scientists have discovered that in order to build an extraterrestrial ecological base,Only Mars in space meets the conditions for human survival and migration, but one fatal drawback is that there is no oxygen on Mars...
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Why does a flame not "fall" under the action of gravity? What happens to flames under weightlessness?
We know that all objects on Earth are subjected to the action of gravity. If there were no gravity, the entire Earth would be in chaos...
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JD's 001 courier, the boss promised to buy a house after working for 5 years, but what happened afterwards?
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What should Pinduoduo do when encountering professional dummies?
From the perspective of consumers, selling San Wu products by merchants is considered a violation of laws and regulations. Whether on the platform or in relevant departments, it is the fault party and should be compensated in accordance with relevant laws and regulations...
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