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 was at bottom of his class. Now, aged 79，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) can lead.
When he was 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 "quite ridiculous".
In spite of his teacher's criticisms(批评), 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 of the adult frog. This technique later helped to create the sheep Dolly 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 this 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.
a. create the sheep Dolly
b. take a cell from an adult frog
c. use a person's skin to create stem cells
d. move a frog's genetic information into an egg cell
e. grow into a clone of the adult frog
Hundreds of years ago, news was carried from place to place by people on foot or by horse. It took days, weeks and sometimes months for people to receive news. Now it is possible to send words and pictures around the world in seconds(秒). Billions of people learn about news stories of their own country and all over the world every day, either by watching TV or reading newspapers. Newspapers have been an important part of everyday life since the 18th century. Many countries have hundreds of different newspapers. How do newspaper editors(编辑) decide which news stories to print (印刷)? Why do they print some stories and not others? What makes a good newspaper story?
Firstly, it is important to report new stories. TV stations can report news much faster than newspapers. Yet, newspapers give more about the same story. They may also look at the story in another way, or they may print completely (完全地) different stories to those on TV.
Secondly, a news story has to be interesting and unusual. People don't want to read stories about everyday life As a result, many stories are about some kind of danger and seem to be "bad" news. For example, newspapers never print stories about planes landing safely, instead they print stories about plane accidents.
Another factor(因素) is also very important in many news stories. Many people are interested in news in foreign countries, but more prefer to read stories about people, places and events (事件) in their own country. So the stories on the front page in Chinese newspapers are usually very different from the ones in British, French and American newspapers.
Smog(雾霾) is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news hostess with China Central Television, discussed the questions in her documentary Under the Dome.
The 103 - minute film was published on major Chinese video - sharing websites on Feb 28. In the film, Chai visits polluted places and talks to officials and scientists. She comes to the conclusion that burning too much coal and oil are the main causes of PM2.5 and smog.
To make things worse, according to Chai, the coal and oil we are burning is of poor quality and don't meet the standards for environmental protection. Therefore they have produced more harmful gas to pollute the air.
To solve the problem, Chai suggests that we should clean our coal and oil or replace them with cleaner energy such as natural gas. In her film, Chai also pointed out that ordinary people can do something to help control smog too. For example, we live a greener life by using more public traffic. Or if we see things that could harm the environment, we can try to stop it. In one scene from the film, Chai sees a dirt mound in a building site exposed in the air, and asks the person in charge to cover it. When she sees a restaurant cooking without any suitable filter facilities, she calls the hotline 12369. The restaurant installed the filter a week later.
Chen Jining, the new minister of environmental protection, praised Chai. "This film encourages ordinary people to care about the environment. This is what we need in the future. "
Believe it or not, I've always been a people pleaser. I often put others before myself because I want to make my friends happyCan you help me with my English?" Grace asked me on the first day after she became my desk mate. "Of course," I replied without hesitation（犹豫）. Grace has been working really hard on her studies and needed my help — although I didn't have much time left for her.
One day after school, while I was doing a huge amount of homework, Grace's phone call came. but I still felt bad about saying no. When Grace ended the call, the clock said it was 00:15 am. But I still had homework left and I wanted to sleep. This was bad for a Junior 3 student who is going to take an important exam this June.
Finally I burst into tears. I felt so tired and realized that the stress had an effect on my health. I tried to get myself out. Studying is more important than other things, . It's now important for me to say no, no, no. "Can you do me a favor?" Grace asked last Monday. "Sorry I just have to review my biology notes," I answered. "All right, it's up to you," she said. I felt completely relaxed when I heard her reply
To be honest, I have felt much happier since learning to refuse. I have more time to spend on my study at present. I still try my best to help others .
A.She complained a lot and it made me feel bored
B.If anyone asks me for help, I always say, "yes!"
C.Anyway, it's not so hard to say no at all
D.but sometimes I say no because I know everyone has a limit
E.so Grace has to come the second
优势 | ●使用方便，用手机即可解锁； ●便宜，半小时只需0.5元； |
不良现象 | ●随处乱停； ●有人偷车/破坏车； |
你的观点 | ？（至少一个理由） |
注意：1)词数80个左右（开头已给出，不计入词数）；
2)不得透露学校、姓名等任何个人信息，否则不予评分。
注：(1)随处乱停 park…disorderly 2)解锁 unlock
In Guangzhou, more and more students begin to ride shared bikes to school. We can see those bikes everywhere.
