考研英语作文万能考研英语作文万能模板篇一Bacteria are etremely small living things. while we measure our own sizes in inches or centimeters, bacterial size is measured in microns. one micron is a thousandth of a millimeter: a pinhead is about a millimeter across. rod-shaped bacteria are usually from two to four microns long, while rounded ones are generally one micron in diameter. thus if you enlarged a rounded bacterium a thousand times, it would be just about the size of a pinhead. an adult human magnified by the same amount would be over a mile(1.6 kilometer) tall.Even with an ordinary microscope, you must look closely to see bacteria. using a magnification of 100 times, one finds that bacteria are barely visible as tiny rods or dots. one cannot make out anything of their structure. using special stains, one can see that some bacteria have attached to them wavy-looking hairs called flagella. others have only one flagellum. the flagella rotate, pushing the bacteria through the water. many bacteria lack flagella and cannot move about by their own power, while others can glide along over surfaces by some little-understood mechanism.From the bacteria point of view, the world is a very different place from what it is to humans. to a bacterium water is as thick as molasses is to us. bacteria are so small that they are influenced by the movements of the chemical molecules around them. bacteria under the microscope, even those with no flagella, often bounce about in the water. this is because they collide with the watery molecules and are pushed this way and that. molecules move so rapidly that within a tenth of a second the molecules around a bacteria have all been replaced by new ones; even bacteria without flagella are thus constantly eposed to a changing environment.考研英语作文万能模板篇二I think high school students should be allowed to choose some of the subjects they study. However, the basic subjects, like mathematics, literature, and science, should be mandatory for all students.When I was in high school, we were allowed to choose three electives each semester. Electives were subjects that weren’t part of the basic curriculum. They included things like music, journalism, art, and various kinds of team sports. Choosing some of these subjects to study gave me a chance to experiment. I was able to get a head start on what I was going to study in college.However, college preparation shouldn’t be the main factor. I think all students should be allowed to take a certain number of courses just because they’re interested in them. For many students, high school is the last chance to learn about things they’re interested in. Maybe once they have a job there won’t be time for studying.Of course, it’s also important that students study certain basic subjects. If I’d had a choice, I know I wouldn’t have studied mathematics or science. I wasn’t very interested in them. However, once I was in class, I found myself getting interested. I wouldn’t have known this if I’d been given the choice, because I would have chosen not to take the courses.High school students aren’t always the best judges of what they’ll find useful in the years ahead. They need the guidance of experts in the field of education. However, they also need some freedom to follow their curiosity and individual interests. They should be given the freedom to choose some courses, while being required to take others.考研英语作文万能模板篇三happy birthday to you where did that song e from?the story of how the song happy birthday to you came to be, began as a sweet one, that later soured. two sisters, mildred hill, a teacher at the louisville, kentucky eperimental kindergarten, and dr. patty hill, the principal of the same school, together wrote a song for the children, entitled good morning to all. when mildred bined her musical talents, as the resident epert on spiritual songs, and as the organist for her church, with her sisters epertise in the area of kindergarten education, good morning to all was sure to be a success.the sisters published the song in a collection entitled song stories of the kindergarten in 1893. thirty-one years later, after dr. patty hill became the head of the department of kindergarten education at columbia universitys teacher college, a gentleman by the name of robert h. coleman published the song, without the sisters permission. to add insult to injury, he added a second verse, the familiar happy birthday to you.mr. colemans addition of the second verse popularized the song and, eventually, the sisters original first verse disappeared. happy birthday to you, the one and only birthday song, had altogether replaced the sisters original title, good morning to all.after mildred died in 1916, patty, together with a third sister named jessica, sprang into action and took mr. coleman to court. in court, they proved that they, indeed, owned the melody. because the family legally owns the song, it is entitled to royalties from it, whenever it is sung for mercial purposes.考研英语作文万能模板篇四do you condemn yourself for things which you did--or failed to do--in the past? everyone does this at some point. however, if you want to lead a successful and productive life, it is imperative that you release the past and not blame yourself for events which have already transpired and which cannot be changed.the successful person takes this approach: learn from past mistakes and make adjustments in future behavior. the strategy of berating yourself for past conduct solves nothing and only serves to lower your self-esteem. you create a vicious cycle where negative experiences and negative feelings are reinforced, which leads to more negative outes and more negative feelings.if you insist on dwelling in the past, i suggest that you focus on your past successes. visualizing and thinking about past successes is an excellent way to build confidence and self-esteem. what you think about is what you bee. therefore, when you concentrate on your successes, you help to create future successes.when you find yourself starting to dwell on past negative experiences, immediately halt and remind yourself: there is nothing i can do now which will change what happened. i learned a valuable lesson and will act in a more constructive manner next time. regardless of what you have done--or failed to do--the only sane approach is to accept it and move forward.this is faith at faith radio online-simply to relax. the successful individual does not waste precious mental energy dwelling on past events which cannot be changed. instead, he or she uses past mistakes as learning experiences and springboards to future successes.考研英语作文万能模板篇五Where do we e from? How did the universe begin?why is the universe the way it is? How will it end?Sll my life, i have been fascinated by the big questions that face us, and have tried to find scientific answers to them.If, like me, you have looked at the stars, and tried to make sense of what you see, you too have started to wonder what makes the universe eist. The questions are clear, and deceptively simple. But the answers have always seemed well beyond our reach. until now.The ideas which had grown over two thousand years of observation have had to be radically revised. In less than a hundred years, we have found a new way to think of ourselves. From sitting at the center of the universe, we now find ourselves orbiting an average-sized sun, which is just one of millions of stars in our own milky way galay. And our galay itself is just one of billions of galaies, in a universe that is infinite and epanding. But this is far from the end of a long history of inquiry.Huge questions remain to be answered, before we can hope to have a plete picture of the universe we live in.I want you to share my ecitement at the discoveries,past and present, which have revolutionized the way we think. From the big bang to black holes, from dark matter to a possible big crunch, our image of the universe today is full of strange sounding ideas, and remarkable truths. The story of how we arrived at this picture is the story of learning to understand what we see.我们来自何方？宇宙如何开始？为什么宇宙是这样的？它将如何结束？我一生都迷恋于我们所面临的这些大问题并试图找到他们科学的答案。