Fly into space 600字高中英语作文

　　the human yearning for a long time for the vast expanse of space. From the myth of chang e to is also true of the journey to the west, people describe the space as a wonderful fairy world. In people's imagination, the space is a perfect paradise of the United States. In the real world, however, the space is not as romantic as people imagine. Into space, is the danger of human face rather than the fairyland. The problem of manned space flight is far more than just "lonely at the top".

　　the first manned flight to overcome the difficulties is vacuum environment effects on people. If there is no air in space, the human body naked in a vacuum, will not be able to breathe. If the astronaut's cockpit, habitats once leakage gas, is likely to cause death.

　　to overcome the second difficulty is the impact of intense radiation from space, this space radiation including electromagnetic radiation, the sun radiation and high energy particles. Solar electromagnetic radiation in the visible and infrared parts mainly influences the temperature of the spacecraft, can damage some of spacecraft surface material, also influence the temperature and the density of the upper atmosphere, thus the burden of aggravating Leo spacecraft orbit control. High-energy particle radiation has direct influence on the spacecraft themselves. High-energy particles moving around the earth for a long time, in low orbit spacecraft pose a serious threat. The radiation of spacecraft surface material not only, and will make the inside of the spacecraft solar cells, organic material, the performance of semiconductor devices and integrated circuits such as changing, even cause permanent damage.

Chinese cabbage

　　Cabbage is a kind of extremely common vegetables north and the south. Although it is common, in my spare time, to get a table "cabbage", both friends and keeping in good health.

　　vegetable cultivation has a long history and wide variety. According to research, since there are human, it is closely related to people's life. The type north jiaozhou white, stimulation, Beijing, tianjin green, northeast big cabbage, shanxi burrs, etc.; The south has sharply white, silkworm green cabbage, cockscomb white, snow, etc.

　　Chinese cabbage delicious, nutritious, has "the king of vegetables" reputation. Used in stewed, Fried, inline skate, mix fillings, side dishes can be, and do so saying cloud: "the number of pork meat in the United States, dish only fresh cabbage."

　　in addition to Chinese cabbage as a vegetable for human consumption, we still have some medicinal value. Recorded in ancient books, the doctors don't record ", "Chinese cabbage could be accessed by the stomach, in addition to the chests are vexed, drug therapy". In the qing dynasty in the "compendium of materia medica shortage make-up" said: "Chinese cabbage juice, GanWen non-toxic, intestines and stomach, in addition to the chest vexed, thirst, therapy, urine, and suspend the syndromes", saying that "winter juice is a plus.

　　All in all, Chinese cabbage to eat it a lot, there are hundreds of different into the book alone, in the northeast, the most common or eat cabbage soup and pickled vegetable stew stew. The northeast people like cabbage stains into sour pickled cabbage, sour pickled cabbage hot pot stew, braised big bone became the northeast people proud home cooking. Sour pickled cabbage stewed bone after the table, aroma, steaming, bones, flesh trembled, while, distinct; Glittering and translucent get rid of appears the sour pickled cabbage, spray, let a person to take chopsticks, ear seems to think of DongBeiQiang across four exclaim, "cui flower, the sour pickled cabbage!"