The rockets take astronauts and man-made satellites(卫星)into space. The satellites are used for communication, weather checking and research. But how do satellites stay up without falling down?
There are two opposite forces influencing the satellite. One of them is the force of gravitation(地心引力), which tries to pull the satellite towards the earth and is like a rope which keeps the satellite from flying away. The other force is created by the turning of the satellite around the earth. This force tries to take the satellite away from the earth. With these two forces, the satellite goes round and round.
Everything that goes up has to come down. It is only a matter of time before a satellite comes back to the earth. As time goes by, the satellite loses its speed, which makes the force pulling it towards the earth stronger than the force pulling it away. This makes the satellite fall down to the earth.
1.Two same forces have an influence on the satellite.
2.The force created by the turning keeps the satellite from flying away.
3.Two opposite forces make the satellite turn round and round.
4.The satellite will stay in space forever.
Do you get lots of reading tasks as part of your homework? You might wish that you could read faster. There are some people who say that you can learn to read at super-high speeds. But experts disagree on this idea.
"Speed reading is not actually possible," said Elizabeth Schotter, a scientist at the University of South Florida, US. Schotter pointed out that people who say that they can teach others how to speed read are usually doing it to make money by selling courses and books.
In fact, speed reading has been made known to people since 1959, when US educator Evelyn Wood introduced a speed reading program. Several US presidents have even asked their officers to take sped reading courses. However, there is no real science behind sped reading.
Schotter explained that reading is a task difficult to finish. It includes four steps: seeing a word, getting back its meaning from your memory, connecting it to other words. in the same sentence, and then moving on to the next word, This process uses many parts of the brain at one time. It can't be sped up.
Some people who say they are able to speed read are simply skimming. Skimming involves reading a passage quickly and only looking for certain words or sentences. Skimmers can figure out the main idea of a passage—especially if it's a topic they're familiar with—but they will not be able to remember all the pieces of information.
So is there a way to become a faster reader? Research suggests that you should try to improve the number of your words and simply read more.
1.According to Schotter, which of the following is TRUE?
A.It's good for students to read at super-high speeds.
B.Speed reading courses are supported by real science.
C.Reading includes four steps, it`s not easy to finish
D.Speed reading courses and books are useful for us.
2.What can we know from Paragraph 5?
A.Skimmers will not forget all the pieces of information.
B.You must read the passage carefully when you are skimming it.
C.Skimming focuses on all the words or sentences of a passage.
D.By skimming, skimmers may find the main idea of a passage.
3.According to this passage, how to read faster?
A.Learn more words and read more. B.Taking speed reading courses can help.
C.Read more books about sped reading. D.See the words at super-high speeds.
When ice is on the ocean, the polar bears are on the hunt. They are hunting seals. Polar bears need the ice. They can’t catch seals as well in the water, where there is no ice.
In summer, some of the sea ice becomes water. Now, however, the sea ice is becoming water earlier than it used to. There is not as much time for the polar bears to hunt for food. They should have enough fat in their bodies to keep them from getting hungry. Some polar bears, however, haven’t been able to get enough to eat. By the end of the summer, they are going to die.
Scientists want to learn all they can about polar bears and how they can help them. To help the bears, they have to do tests. It is difficult, however, for scientists to get close to the bears. Scientists fly in a helicopter, over the places where polar bears live. When they notice a bear, they shoot a pointed object at it. The object makes the bear go to sleep. While the bear is asleep, the scientists can do their tests. The most important test is the fat test. If the bear hasn’t eaten for two months, it won’t have enough fat to live on.
Many people are worried about the ice that is becoming water. Polar bears have to go further and work harder to find food. If the ice keeps becoming water, one day there might not be any polar bears.
1.The underlined word “hunt” in the first paragraph means: __________
A.搜集 B.游荡 C.狩猎 D.探索
2.If polar bears want to find food, what do they need?
A.Fat. B.Ice. C.A pointed object. D.Water.
3.What’s the main idea of this passage?
A.Polar bears are in great danger. B.Polar bears like hunting for seals to eat.
C.It’s difficult for scientists to test bears. D.The ways to help polar bears.
Everyone has hobbies. Hobbies_________us a lot of happiness. For most of us, the activities we like to do are common and easy. However, there are_________people who like to take risks._________are more interested in doing dangerous sports, such as snowboarding, diving(潜水)and rock climbing.
Many people enjoy_________. You can do it indoors on special walls or outdoors on real mountains. There are many advantages to rock climbing-it is fun and it also helps people_________their worries.
The most important tool to have is good shoes. They need to be half a size smaller than your usual_________. The next thing you need is a harness(保护带). This allows you to move freely, _________it will hold you up if you fall. It's important to know how to use your tools. If you are a beginner, it's best to have lessons. A climber with experience can help you a lot_________you are learning to climb.
Rock climbing is very exciting for people of different ages. Climbers, however, must be careful not_________the environment. Sometimes rock climbers leave rubbish on the mountains which they climb. They should take it__________them and throw it away. This will let future climbers enjoy a clean environment.
1.A.take B.bring C.provide D.have
2.A.other B.the other C.another D.every
3.A.We B.You C.All D.They
4.A.snowboarding B.diving C.rock climbing D.swimming
5.A.remember. B.forget C.solve D.keep
6.A.size B.shape C.color D.kind
7.A.and B.but C.so D.or
8.A.before B.when C.after D.until
9.A.to protect B.to produce C.to pollute D.to save
10.A.along B.to C.for D.with
今天的英语课上，班级进行了题为“我送过的一份珍贵礼物，”的主题分享。请你写一篇英语短文，汇报你们四人小组的分享内容，需包括以下要点。
From | Bob | Kate | Lily | You |
To | parents | good friend | foreign teacher | （请补充） |
What |
soup |
Photo album |
Paper cutting |
（请补充） |
Why | thanks and love | friendship | culture | （请补充） |
注意：1. 词数：80词左右（短文的开头己给出，不计入词数）：
2. 不得透露学校、姓名等任何个人信息，否则不予评分。
In today's English class, we had a discussion on “A valuable gift I gave”. Here is what we shared in ou group. __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
我很好奇你在艺术节唱了哪首歌。
I wonder_________song__________ ____________at the art festival.
