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广西2018-2019学年初中英语中考总复习:中考英语押题模拟试题(一)(音频暂未更新)

作者UID:9673734
日期: 2024-11-07
中考模拟
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    There is a hiking trail (远足小径) near Sara's home. The trail begins at the foot of the mountain and leads all the way to the top. One day, Sara and her father planned to go on a hike. Sara had packed lunches earlier that morning. Her lather filled their backpacks with other things and they set out!

    As they started up the trail, Sara's father pointed out many different plants along the trail. He showed Sara the difference between the leaves of an aspen tree and a spruce tree. Sara was glad that her father knew so much! She always learned something whenever they went on a hike.

    "Look over there," Sara said in a low voice. They had just turned a comer on the mountain trail. Lying in the grass next to the trail was a small baby deer(鹿). It looked at them with wide eyes, but it did not move.

    "Where is its mother?" Sara asked. "Do you think we should stay here and watch it?"

    "That's a good idea," answered her dad. "We must not go any closer, though." As they sat down and unpacked their lunch, Sara asked her dad why they couldn't go any closer to the deer. He explained that sometimes, if the mother smelled humans too close to her baby, she would be too afraid to come back. Sara and her father agreed that they would wait for the mother to come back, but that they would not get too close to the deer.

    Soon a larger deer walked slowly up to the baby deer. The mother and baby ran quickly down the trail.

    Sara and her father packed up their things and continued up the mountain. They knew that the deer was now safe.

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    Life is full of surprises and you never know how things will turn out.

    Sir John Gurdon is a good example of this. As a boy, he was told he was hopeless at science and finished bottom of his class. However , the very same Gurdon shared the 2012 Nobel Prize in Medicine with Japanese stem cell (干细胞) researcher Shinya Yamanaka.

    Like so many scientists, Gurdon shows us where the power of curiosity and perseverance (坚持不懈) can lead.

    At the age of 15 in 1948, Gurdon ranked last out of the 250 boys at his high school in biology and every other science subject. Gurdon's high school science teacher even said that his dream of becoming a scientist was " quiteridiculous".

    In spite of his teacher's criticisms, Gurdon followed his curiosity and kept working hard. He went to the lab early and left later than anyone else. He experienced thousands of failures.

    "My own belief is that we will, in the end, understand everything about how cells actually work," Gurdon said.

    In 1962 ,Gurdon took a cell from an adult frog and moved its genetic( 基因的 ) information into an egg cell . The egg cell then grew into a clone(克隆) of the adult frog. This technique later helped to create Dolly the sheep in 1996,the first cloned mammal(哺乳动物) in the world.

    In 2006, Gurdon's work was developed by Yamanaka to show that a sample (样本) of a person's skin can be used to create stem cells. Using the technique, doctors can repair a patient's heart after a heart attack.

    "Luck favors the prepared mind," Gurdon told the Nobel Prize Organization. "Ninety percent of the time things don't work ,but when they do ,you have to seize(抓住) the chance. "

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