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牛津版(深圳·广州)九年级下学期Unit 5 Sport综合测试题

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日期: 2024-11-27
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A company named Manta5 in New Zealand has developed an electric bicycle that can be used on water—the Manta5 eBike.

The company describes its invention as half-bike and half-plane. It says riding one feels like normal cycling, but on the water. It uses a battery (电池), motor and underwater wings to move across water about 100 kilometers in five hours. The bikes are made to be strong, but still light enough to carry.

Manta5 was started in early 2011 by Guy Howard and Roland who are bothpassionateabout cycling. They used to go cycling and fell in love with it deeply. Howard had wanted there to be more choices for would-be water cyclists, and when he met Roland, he decided to try and make that happen. It took the company eight years to develop the bike, but it was able to show a prototype (原型) in 2017. The company says that a short video of that first bike got 350 million views on the Internet.

The first bikes that Manta5 produced sold out in six months. It says that riders in New Zealand are already fans, and are using them to ride across lakes, rivers and ocean waves.

The company now hopes the bikes will become popular in the US as well. At $8,990, however, the eBike certainly isn't cheap.

Greg Johnston, CEO at Manta5, says that learning to ride the water bike is like cycling for the first time: You might have to try a few times, but it's a lot of fun once you get the hang of it. The company even believes that in the near future, biking across the water could be a sport, and even be included in the Olympics.

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Shenzhou 13 manned spacecraft (载人航天飞船) went to space (太空) successfully on October 16, 2021. Three Chinese astronauts, Zhai Zhigang, Wang Yaping, Ye Guangfu were taken to space. They will stay in space for six months. It is the eighth time for Chinese to visit space after Yang Liwei went as the first Chinese 19 years ago. These special "visitors" can take fantastic photos in space, just like taking trips there. Can common people go to visit space like them? The answer is "yes".

On September 15, Space X sent four common people into space. The four spent three days in space. Just two months ago, in July, 70-year-old British billionaire (亿万富翁) Richard Branson, and 57-year-old American billionaire Jeff Bezos, both flew into space. But some think these trips are for the super rich. With the sky-high prices, most common people should give up their space dreams. However, US flight engineer Bobak Ferdowsi believes the price will come down. "Maybe in 10 to 15 years, it's a decision between 'do I buy a new car, or do I go to space?' "

Anyway, even we can't have a space trip now, we'll be able to have a science class from space. The woman astronaut Wang Yaping will be the space teacher to give us such a lesson just as she did nine years ago. That will be great fun. We will also be able to enjoy a space movie. A Russian film team stayed on the International Space Station from Oct 5 to 16 to film the movie Challenge. It's the first time a movie was filmed in space.

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In 1997, Lottie Williams was walking through a park in Oklahoma, USA, with her friends.She picked the object up. It was about as heavy as a tennis ball. Later, scientists told her it was a piece of a DeltaⅡrocket that had been used to launch a satellite (发射卫星).

We use satellites to send and receive TV and radio signals (信号). To report the weather and for many other things. But when they become old or break down, we just leave them there. They become space junk.

Scientists think there are about 16, 000 objects larger than 10 centimeters wide flying around the Earth, and tens of millions of smaller objects too.That's fast! And it's their speed that makes these pieces of space junk really dangerous. If one small piece of space junk hits something at high speed, it can do a lot of harm.But in 2009, an old Russian satellite hit an American satellite and created 2,000 pieces of space junk!

Pieces of space junk enter the Earth's atmosphere (大气层). Again. Lottie Williams is perhaps the only person who has been hit. Most space junk burns up and doesn't reach the Earth's surface.It made a hole in the ground 30 centimeters deep and over 3. 3 meters wide. Lottie was lucky she wasn't hit by it!

A. Luckily, that hardly ever happens.

B. They travel at around 7 kilometers a second(秒).

C. Many countries around the world have sent satellites into space.

D. Suddenly something fell on her shoulder and then to the ground.

E. But in 2011, a 35-centimeter-wide metal ball fell to the Earth in Namibia, Africa.

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