4 . The Biggest Stadiums in the World

People have been pouring into stadiums since the days of ancient Greece. In around 80 A.D., the Romans built the Colosseum, which remains the world’s best known stadium and continues to inform contemporary design. Rome’s Colosseum was 157 feet tall and had 80 entrances, seating 50,000 people. However, that was small fry compared with the city’s Circus Maximus, which accommodated around 250,000 people.

These days, safety regulations-not to mention the modern sports fan’s desire for a good view and comfortable seat — tend to keep stadium capacities (容量) slightly lower. Even soccer fans tend to have a seat each; gone are the days of thousands standing to watch the match.

For the biggest stadiums in the world, we have used data supplied by the World Atlas list so far, which ranks them by their stated permanent capacity, as well as updated information from official stadium websites.

All these stadiums are still functional, still open and still hosting the biggest events in world sport.

·Rungrado 1st of May Stadium, Pyongyang D.P.R. Korea. Capacity: 150,000. Opened: May 1,1989.

·Michigan Stadium, Ann Arbor, Michigan, U. S. Capacity: 107,601. Opened: October 1, 1927.

·Beaver Stadium, State College, Pennsylvania, U. S. Capacity: 106,572. Opened: September 17, 1960.

·Ohio Stadium, Columbus, Ohio, U. S. Capacity: 104,944. Opened: October 7,1922.

·Kyle Field, College Station, Texas, U. S. Capacity: 102,512. Opened: September 24, 1927.

6 . Technology use in class

You will be allowed to use your favorite type of technology (e.g. , laptop, iPad) in class if you choose to do so, since some people prefer taking notes that way. If you decide to use it, please avoid distractions, like e-mail checking or accessing social media during class.

Academic integrity

You will be expected to be the author of the assignments you turn in for this course. Your papers will require you to draw upon existing research to inform and lend credibility (可信度) to your arguments. To credit the ideas of others properly, you must follow two main rules:

●Always cite the source of a finding, idea, or argument that is not your own, no matter how much rewording you have done.

●Always put the findings, ideas, and arguments you cite into your own words. If a direct quote is absolutely necessary, put the text in quotation marks (引号) and include a page number in your citation.

Absences and late assignments

You are expected to attend every class, since your participation in class will count towards your final grade. Students with excused absences will have a chance to complete missed class assignments (and participation) without punishment. Otherwise, class participation can only be completed during class. Assignments submitted after the deadline will be considered late assignments. Late assignments will be graded with ½ of the grade if submitted by no more than one week following the original deadline. If not submitted within one week following the original deadline, late assignments will not be graded.

8 . Fun things to do in high school

Learn another language

Your school might be holding foreign languages classes, so this is a great way to start your language learning journey! If you want more self-paced learning, apps like Duolingo are easily accessible (可使用的) on our mobile phones. As our world becomes more interconnected, it’s always good to learn another language or two.

Aim for a semester (学期) of straight A

This can be a difficult task but not impossible to achieve, as long as you put in the right amount of work and effort. If you are struggling(挣扎)with your grades, you can host or join group studies with your classmates!

Don’t be disheartened if you are not able to get an A in a semester. What’s important is having the drive to go forward. As a famous person once said, “He who would climb a ladder must begin at the bottom.

Experience another culture

Culture and tradition are something that all humans share. No matter where we come from, we always bring our culture with us. People coming from different cultures may be among your friends or neighbors.

You can go to a museum, read a book, or try new food in your area. Remember to keep an open mind and take the time to learn about them.

Bring a shareable treat to class

If you know your way around the kitchen, you can impress your class by making and bringing them a delicious treat! Not only will this make their stomachs happy, but you’ll also bond (联系) the whole class together. Just don’t forget to check with your teacher first before bringing one.

10 . With rounds of pioneering space flights that could set the stage for future space tourism, it is worth looking at what might be involved for the human exploration of Mars, though it's likely decades away. Technological challenges aside, as we continue to expand our exploration of Mars, there is a question: What might be the lessons of past voyages of discovery that we should think about?

Human exploration has led to many extraordinary new discoveries, but it has also led to the exploitation of resources. Not long after early European settlers arrived at America, they declared their independence and created the constitution by which modern American society functions. However, this did not prevent the settlers from referring to native people as savages and taking away their rights to liberty, happiness, and even survival. Native Americans were quickly killed by wars and new diseases as the new settlers expanded their land. The natural environment, with which they had established a harmonious relationship, was similarly destroyed by the settlement.

Mars certainly has an impossible environment for human life, but on Mars, humans will be the invasive species. Will our landing on mars break the ecosystem on Mars? It is possible that Mars has ideal minerals for future development. But apart from technology challenges, will the mining have a disastrous environment impact on this red neighbour as it has already had on Earth?

The achievements of space exploration are certainly to be applauded. The contributions of the related researches on chemistry, medicine and many others are potentially limitless. However, as we look to exploring worlds beyond our own, we need to begin now to look at history to consider how best to engage with different life forms, cultures and environments. We may be capable of writing a law, but we first need to clear our potential invasive impact on another planet that may be completely defenseless.