In 1905, as part of his Special Theory of Relativity, Albert Einstein published the point that a large amount of energy could be released from a small amount of matter. This was expressed by equation E = me 2(energy = mass times the speed of light squared). But bombs were not what Einstein had in mind when he published this equation.

    In 1929, he publicly declared that if a war broke out he would “refused to do war service, direct or indirect…” His position would change in 1933, as the result of Adolf Hitler's coming into power in Germany.

    Einstein's greatest role in the invention of the atomic bomb was signing a letter to President Franklin Roosevelt urging that the bomb be built because some physicists feared that Germany might be working on an atomic bomb. Among those concerned were physicists Leo Szilard and Eugene Wigner. But Szilard and Wigner had no influence with those in power. So in July 1939 they explained the problem to someone who did: Albert Einstein. After talking with Einstein, in August 1939 Szilard wrote a letter to President Roosevelt with Einstein's signature on it, which was delivered to Roosevelt in October 1939.

    Germany has invaded Poland the previous month; the time was ripe for action. That October research of a-bomb began but proceeded slowly because the invention of the atomic bomb seemed distant and unlikely. In April 1940 an Einstein letter, ghost-written by Szilard, pressed the researchers on the need for “greater speed”.

    As the realization of nuclear weapons grew near, Einstein looked beyond the current war to future problems that such weapons could bring. He wrote to his friend about his fear about the future use of the a-bomb.

    The atomic bombings of Japan occurred three months after Germany gave in.

In November 1954, five months before his death, Einstein summarized his feelings about his role in the creation of the atomic bomb: “I made one great mistake in my life… when I signed a letter to President Roosevelt recommending that atom bombs be made; but there was some justification—- the danger that the Germans would make them”.

根据短文内容，选择最佳答案，并将选定答案的字母标号填在题前括号内。

    I was never very neat, while my roommate Kate was extremely organized. Each of her objects had its place, but mine always hid somewhere. She even labeled(贴标签) everything. I always looked for everything. Over time, Kate got neater and I got messier. She would push my dirty clothing over, and I would lay my books on her tidy desk. We both got tired of each other.

    War broke out one evening. Kate came into the room. Soon, I heard her screaming. “Take your shoes away! Why under my bed!” Deafened, I saw my shoes flying at me. I jumped to my feet and started yelling. She yelled back louder.

    The room was filled with anger. We could not have stayed together for a single minute but for a phone call. Kate answered it. From her end of the conversation, I could tell right away her grandma was seriously ill. When she hung up, she quickly crawled(爬under her covers, sobbing. Obviously, that was something she should not go through alone. All of a sudden, a warm feeling of sympathy rose up in my heart.

    Slowly, I collected the pencils, took back the books, made my bed, cleaned the socks and swept the floor, even on her side. I got so into my work that I even didn't notice Kate had sat up. She was watching, her tears dried and her expression one of disbelief. Then, she reached out her hands to grasp mine. I looked up into her eyes. She smiled at me, “Thanks.”

    Kate and I stayed roommates for the rest of the year. We didn't always agree, but we learned the key to living together: giving in, cleaning up and holding on.

    Nobody should ever be turned away from a church.I've always said that and have believed it,but I had to put it in practice the other night.It was my birthday,and we had a party at church,upstairs in the hall.My son Tim's roommate Garth sang in a great band,the Rooks,and they played for us.They performed wonderfully.

    Suddenly I noticed a man I'd never really seen before.He was big,never took off his coat or hat and stood in the middle of the room,looking a bit nervous.A homeless guy had just wandered into my birthday party,I thought.And I kept thinking about the guy who hadn't been invited,I meant to head over to him and politely asked him to leave. Wait a minute,I thought.Should anybody be turned away from God's house?Of course other uncertain thoughts crossed my mind: What if he was here to make trouble?What was under that coat?What if he was a terrorist?But some higher born qualities held sway."Hi,"I said,walking over to him."I'm Rick.This is a birthday party for me. Would you like something to eat?"He nodded his head.I got him a plate of food and told him he was welcome to stay. He nodded.He stayed there in the center of the room,smiling and swaying to the music.After a long time I looked for him again,and he was gone.

    I've always loved the parable（寓言）of Luke about the man who gives a big dinner and when no one comes,he sends his servants into the city streets to welcome the poor,homeless,disabled and blind.I don't know who invited this guy but I was glad he was there.I hope he had a good time.

    Eating spicy foods frequently may be tied to a slightly lower risk of an earlier death, according to a new study. However, more research is needed to confirm the link, experts say.

    The researchers found that the people in the study who ate spicy foods one or two days a week were 10 percent less likely to die during the study, compared with those who ate spicy foods less than once a week, according to the study published today(Aug. 4) in the journal The BMJ. Moreover, the people in the study who ate spicy foods three or more days a week were 14 percent less likely to die during the study, compared with those who ate spicy foods less than once a week.

    However, the study was observational, and so it is too early to tell whether there is a causal relationship between eating spicy food and lower mortality, said study author Lu Qi, an associate professor at Harvard School of Public Health in Boston, Massachusetts. "We definitely need more data from other populations," Qi told Live Science. “The researchers don't know why exactly the consumption of spicy food may be linked to lower mortality, but previous research on cells and animals has suggested several possible mechanisms,” Qi said.

    “It is unclear whether the observed associations are the direct result of spicy food intake, or whether spicy foods are simply a marker for other beneficial but unmeasured dietary components(成分),” said Nita Forouhi, a nutritional expect. At this point, researchers don't know for sure whether eating spicy foods can have a beneficial effect on human health and mortality, Forouhi wrote. "Future research is needed to make sure whether spicy food consumption has the potential to improve health and reduce mortality directly, or if it is merely a marker of other dietary and lifestyle factors," she said.

    Most people know something about the greenhouse effect. Factories send gasses such as carbon dioxide, or CO₂, into the atmosphere, the air around the earth. In the past, this wasn't a problem because trees absorbed the CO₂. But now people in many countries are cutting down billions of trees all around the world. At the same time, factories are sending more CO₂ into the atmosphere. It's difficult to believe, but factories put billions of tons of CO₂ into the atmosphere every year. One ton is over 2000 pounds, so it is a lot of pollution. There is too much CO₂ and there aren't enough trees, so the world is getting warmer. In other words, we have a greenhouse effect. This is terrible for the environment.

    What can we do about this? Firsts we can stop using so much coal and oil. We can learn to use different kinds of energy: the sun, wind, steam from volcanoes，and heat from inside the earth. Second, instead of cutting down trees, we should plant more trees. One tree can absorb ten pounds of carbon dioxide every year.

    The trees are good for the earth's atmosphere and for Guatemala (拉丁美洲国家危地马拉).In small towns and villages in Guatemala, most women are poor and have hard lives. Trees help them in three ways. First, the Connecticut factories pay them to plant the trees. Their pay is com, not money. The com is good for their children. Second, these women know a lot about their environment. They know where to plant when to plant, and what kinds of trees to plant. For example，they plant many fruit trees. The fruit gives them vitamins for their families^, diets. Other trees are good for firewood. In a few years, the women won't spend so much time looking for firewood. Third, all these trees are good for the soil. Now rain can't wash the soil down from the mountains so easily.

    This plan isn't enough to stop the greenhouse effect. However, it's a start. The woman of Guatemala are helping themselves and helping their environment.

    Visit the Newseum During "Museum Day"！

    Museum Day is an annual celebration of boundless curiosity hosted by Smithsonian magazine. Participating museums and cultural institutions across the country provide free entry to anyone presenting a Museum Day ticket. The Museum Day ticket provides free admission for two people.

    Here is some information about a popular museum — the Newseum.

    EVENT DETAILS

    Registration: free tickets will be available for the public to download on December 15 via the link: https://www.smithsonianmag. com/museumday/museum-day-2018/.

    Advanced registration is requested so that the museum sites know how many people to expect. If you don't register beforehand you may still be admitted the day of the event, but no guarantee for admission. All are welcome to attend including children and groups.

    Meeting Point #1: From 7:45 – 8:00 some volunteers will be in the Starbucks at 325 7th St NW before walking 2 blocks to the Newseum.

    Meeting Point #2: Outside the Newseum's Pennsylvania Avenue entrance. The Newseum opens at 9:00 am. However, as this is an extremely popular event we highly recommend arriving as early as possible, by 8:15 if you can, to bypass the masses that will show up later in the day.

    Meeting Point #3: Once the museum opens we recommend immediately heading to the 6th floor to avoid the masses since most people start on the 1st floor. On the 6th floor, the Hank Greenspun Terrace, which overlooks Pennsylvania Avenue and the U. S. Capitol, has one of the best views in Washington, DC. After that you can proceed through the museum's exhibits starting on the 6th floor and working our way down. The Newseum is open until 5:00 pm and guests are free to arrive and depart whenever they like.