Earth is the third planet from the sun.It is one of the four inner planets.The other three inner planets are Mercury,Venus,and Mars.The inner planets are also called the rocky planets,because they are made of rocks. Earth is often called the "Water Planet",because it is the only planet in our solar system which has liquid water on its surface.About 70% of the surface of Earth is covered by water! The other part of Earth is made up of continents and islands which have different landforms on them.Examples of landforms are mountains and plains.Plants and animals can live on Earth,because it has so much water. Earth spins very quickly compared to other planets.It only takes Earth 24 hours to spin around its axis one time.One Earth day is 24 hours long!Earth orbits the sun in 365 days! This makes one Earth year 365 days long! Earth is the only planet in our solar system where humans,other animals,and plants can live.There is plenty of water to drink or to live in.Water is present on Earth in its big oceans and in the air! Clouds are made of water vapor.The atmosphere has a lot of oxygen in it for animals to breathe,but the rest of our "air" is made up of water vapor,nitrogen,carbon dioxide,and other gases.The air is perfect for plants to grow.Earth temperature is not the same in all places,but the temperature is just right for plants,animals,and humans in most places on Earth. Like the other inner planets,Earth has volcanoes.Volcanoes on Earth are different from those on other planets,because they still erupt.Scientists think that there may be active volcanoes on other planets and moons in our solar system,but they are still studying this. Earth has one planet which we call the Moon.The surface of the Moon has many craters on it These were caused when meteorites hit it.It has many volcanoes on it which do not erupt anymore.We can see the moon at night without using a telescope.It is the closest space object to our planet,Earth. Life exists on Earth, _ . A) because the water,air,and temperature are just right B) there is water vapor in clouds C) Earth is the planet closest to the sun D) earth has volcanoes
A
Here is a passage about learning a foreign language. Outside of class, the most natural way of finding out if you are making mistakes is from other people's responses. If the mistakes are too serious, your listeners will be asking you all the time what you mean. If they are not so serious, then people may be asking you whether you said such and such. That will tell you how close you are to speaking "cogently". Of course, there are other times when it is important to have errors pointed out. Your class assignments are probably marked in this way, in which case you need to spend time going over them to take advantage of the individual feedback. In some classes the teacher gets better and better at grammar because she does all the corrections, but the students make slow progress if, when an assignment is returned, they quickly stuff it into their folders without looking. You are the person who should be connecting your error, even if the marker has signaled them, when you look at them; there are some steps to work through. One distinction that has been made about learners' language is this. You make mistakes about rules that you already know but you make errors about points you haven't learned yet. In other words, you can find your own mistakes, but not your errors. First, make sure you understand what you have written or said, or your correction will simply be another stab at the right answer. Next, decide on the best way of practicing the correct form. Would it help you to write out the sentence once more? Can you make up another similar sentence? Then you could test yourself in a few days time to see whether you have remembered the right form, anyone can get it right immediately after being told. He challenge is to remember it and apply it later. Which of the following might be the most important to work through your mistakes? A) Keeping the right form in mind and using it later. B) Writing out the sentence once more. C) Learning your mistakes by heart. D) Correcting your mistakes and writing down the teacher's words.
A
Q: Roslyn Hing School on long Island recently started a pilot program using iPads in some classrooms. A growing number of schools across the U.S.are multimedia,history through gamse and math with step-by -step animation of complex problems. As part of a pilot program,Roslyn High School handed out 47 iPads on Dec.20,2010 to the students and teachers in two humanities classes. The school district hopes to provide iPads eventually to all 1,100 of its students. The iPads are to be used in class and at hom during the school year to replace texbooks,allow students to correspond with teachers and tum in papers and homework tasks,and preserve a rocord of student work in digital files. "It allows us to extend the classes beyond _ "said larry Reiff,an English teacher at Roslyn who now posts all his course mateials online. But educators are still divided over whether practices to give every student a laptop have made a difference academically. "Thre is very little evidence that kids learn more,faster of better by using these machines,"said Larry Cuban,a retried professor of eduction at Staford University."IPads are excellent tools to attract kids,but then the fieshness wears off and you eget int hard-core problems of teaching and learning." But school leaders say the iPad is not just a cool new toy but rather a powerful and multifunctional tool with a number of applications,including thousands with educational uses. "If there isn't an application that does something I need ,there will be sooner or later,"said Mr.Reiff,who said he now used an application that includes all of Shakespare's plays. We can infer from the passage that _ . A) most old teachers are against the pilot program B) students have achieved a lot after using iPads C) teaching will become less important with the help of ipads D) iPads will be used is more and more schools in the US
A: D
China news, Oct. 26--China Great Wall Society's secretary-general Zhang Ji says that the Chinese Academy of Social Sciences (CASS) would join hands with the Society to produce a 3D picture of the Great Wall so that _ could view its original looks. When the website opens, a picture of the revolving earth will appear against the background of the universe. A click on the Great Wall will bring the earth nearer, and slowly a white line is seen across the Chinese land in the north. A closer view shows that this is the Great Wall. Netizens will be able to appreciate the Great Wall with the eye of a tourist and "walk" from Shanhai Pass in the east of the Great Wall to Jiayu Pass in the west in just a couple of days. They can also take a look at the mineral resources and economic status of regions along the Great Wall. CASS and the Great Wall Society are trying their best to make this dream come true through working together closely. According to Zhang, to achieve the above effects, scientists will rely on airborne remote sensing, national geographical information system and global positioning system to collect detailed data of the Great Wall, analyze and process the data, apply them to satellite images for 3D translation, and thereafter create a 3D digital image of the Great Wall for the entire world to appreciate the really great Great Wall of China via the Internet. The 3D picture will be _ . A) placed over the Great Wall B) made to show the really great Great Wall to the entire world. C) enjoyed only by tourists. D) used to collect geographical information
B