开着拖拉机飚车
who can own the heart .it may be a heard question .someone said I can own it because I am clever.someone said I can own it because I am a kind person..........suddenly a girl said maybe who was brave to tell his mistakes to others.
吃得圆圆的
How long did the first recipient of an artificial heart live? Barney Clark, the retired dentist who received the first artificial heart on December 2, 1982, lived with it for 112 days, when physical complications caused by the artificial implant caused his death. In 1986, William Schroeder became the second person to get an artificial heart, also called a Jarvik-7; he lived for 620 days. The Jarvik-7 was named for its inventor, Dr. Robert Jarvik. He made a device from aluminum and plastic to replace the two lower chambers of the natural heart. Two rubber diaphragms were used to pump the new organ. The entire mechanism was attached to a very large external compressor which kept the heart beating. Since the patient had to be constantly connected to this machine, his freedom of movement and quality of life were limited. The Jarvik-7 came to be used to keep a patient alive until an appropriate donor of a natural heart was found.
聪明的达人安
每次考试过后我都会很紧张。但这次月考却有一种不一样的感觉。这次数学考试考完后，我的心情依然有点紧张，因为上一次数学成绩不理想，我决定迎头赶上。这次公布数学成绩时，我心里有些忐忑不安。当最后一个报到我的名字时，只听徐老师说道：“程柔倾，100分。”而且我是全班第一名。当时，大家都回头盯着我看，我都有点不好意思了。说实话，那时我都有点不敢相信自己的耳朵。但美中不足的是这次语文月考没有发挥好，仅仅得了81分。但我并不气馁，下次月考一定要好好努力，争取发挥出最佳的水平！我自己总结了一下，语文月考时我的作文写的较慢，自己觉得写得也不好，所以成绩不理想。而这次数学试卷完成后，我从头到尾仔仔细细地检查了一遍，找出了好几处错误，都一一改正，所以正确率比较高。这个好习惯我一定要保持！
刘彦热茶
The heart function is to pump blood, or circulation, blood through the blood vessels into the body parts. Blood supplies nutrients and oxygen to the body. All the cells need oxygen to survive. The arteries and veins. Arteries carry oxygen-rich blood. The aorta is the largest artery in the body. The arteries, like branches, reach all parts of the body from the aorta, providing them with oxygen-rich blood. The oxygenated low or deoxidation blood used by the vein transport cells. The deoxidation blood flows from the small veins to the largest veins, the superior and inferior vena cava. The vein carries the blood back to the right heart, and then adds oxygen through the pulmonary circulation. The heart jumps 60 - 100 times a minute and lasts your life. This contraction is stimulated and controlled through the natural pacemaker of the heart. When the current begins, it causes the left and right atria to contract simultaneously, and then the left and right ventricles simultaneously. This synchronous electrical stimulation causes the pump blood and blood circulation of the heart. This blood flow can be perceived through your pulse. The electrical activity of the heart pump blood can also be recorded by electrocardiograph.
