1. What is the speaker doing probably?
A.Introducing an organization. | B.Giving a class. | C.Receiving an award. |
A.People lose interest in science. |
B.Science is too difficult to learn. |
C.People waste too much time on TV. |
A.To train more scientists. | B.To make science popular. | C.To write more science books. |
2 . Investing In the Graphite (化石墨) Revolution
December 21st, 2014
Graphene (石墨烯) is the future. Plain and simple.
Its 200 times stronger than steel, thinner than a sheet of paper, and more conductive than copper.
And that’s not all…
Researchers all over the world are using it for critical advances in a variety of industries. Graphene makes:
·Solar cells — 50x~100x more efficient
·Semiconductors — 50x~100x faster
·Aircraft — 70% lighter
We’re talking about batteries that charge 10x faster and store 10x more power…
Phones and computer displays that bend and fold…
It’s so vital to our future that it’s been named a “supply critical mineral” and a “strategic mineral” by the United States, Japan and the European Union.
Yet only a few companies around the world have access to mineral resource that is required to make graphene. And 70% of supply is controlled by China.
So the setup is perfect for any non-Chinese supply to become an extremely profitable investment, just like rare earths a few years ago.
A new report from the Outsider Club fully outlines the situation:
·What grapheme is used for…
·And why now is the perfect time to invest in this world changing discovery.
To get this new report, simply drop your name in the box below. And in a few moments, you’ll be fully informed on the ins and outs of grapheme. All I ask in return is for you to sign up to receive our financial and economic news elater, Outsider Club.
In each issue, well bring you the financial news from the “Outsiders” perspective. It will show you how to plan your own finances, and manage your own investments. Become a reader of Outsider Club today.
So what are you waiting for?
1. What do you know about graphene?A.It can conduct electricity very well. | B.It is much stronger than paper. |
C.It is much heavier than steel. | D.It is very easy to obtain now. |
A.move much faster | B.work more efficiently | C.save more energy | D.weighs much less |
A.Cheap | B.common | C.profitable | D.worthless |
3 . Blowing Up Balloons with CO₂
Chemical reactions (化学反应) make for some great experiments. You can make use of the CO₂(carbon dioxide) given off by a baking soda (小苏打) and lemon juice reaction to blow up your balloon!
What you’ll need:
●Balloon ●About 40ml of water ●Soft drink bottle
●Juice from a lemon ●I teaspoon of baking soda
Instructions:
●Before you begin, make sure that you pull the balloon long to make it as easy as possible to blow up.
●Put the 40ml of water into the soft drink bottle.
●Add the baking soda and mix it with water.
●Put the lemon juice in and quickly put the balloon over the mouth of the bottle.
What’s happening?
If all goes well, then your balloon should inflate! Adding the lemon juice to the baking soda creates a chemical reaction and produces CO₂. The gas rises up and escapes (逸出) through the soft drink bottle. It doesn’t, however, escape the balloon, pushing it outwards and blowing it up.
1. Which of the following do you need for the experiment?A.Two cups. | B.Apple juice. |
C.250 ml water. | D.A teaspoon of baking soda. |
A.Heat the water. | B.Drink some juice. |
C.Blow up the balloon. | D.Pull the balloon long. |
A.To describe an experiment. | B.To introduce a game. |
C.To produce soft drinks. | D.To save some chemicals. |
4 . When raindrops fall to the ground in summer, a familiar scent always follows. Many people call this the “smell of rain”. However, rain is made up of odorless (无味的) water. So, where does this smell come from?
The pleasant smell has long been an interest of scientists since Australian scientists first documented the formation of petrichor in 1964. According to scientists, some plants produce oils during dry periods.
Yet, it’s the second reaction that creates the most petrichor. It occurs when chemicals produced by bacteria in soil are released.
Lots of animals are sensitive to geosmin but human beings are extremely sensitive to it. When it rains after a long period of dryness, drops of water hit the ground. Geosmin is then released from the surfaces.
A.And when it rains, these oils are released into the air. |
B.The smell of petrichor is quite pleasant to the human nose. |
C.There are a group of microorganisms widely found in soils. |
D.Rain can refresh the soil specially when it rains heavily. |
E.Scientists found the distinctive smell doesn’t come from rain. |
F.The pleasant smell always comes into being with the flow of air. |
G.It is further spread around its surroundings with the aid of wind and rain. |
The Amazon rainforest is home to a great
6 . El Niño, a Spanish term for “the Christ child”, was named by South American fishermen who noticed that the global weather pattern, which happens every two to seven years, reduced the amount of fishes caught around Christmas. El Niño sees warm water, collected over several years in the western Pacific, flow back eastwards when winds that normally blow westwards weaken, or sometimes the other way round.
The weather effects, both good and bad, are felt in many places. Rich countries gain more from powerful Niños, on balance, than they lose. A study found that a strong Niño in 1997-1998 helped America’s economy grow by $15 billion, partly because of better agricultural harvests: farmers in the Midwest gained from extra rain. The total rise in agricultural incomes in rich countries is greater than the fall in poor ones.
But in Indonesia extremely dry forests are in flames. A multi-year drought in south-east Brazil is becoming worse. Though heavy rains brought about by El Niño may relieve the drought in California, they are likely to cause surface flooding and other disasters.
The most recent powerful Niño, in 1997-1998, killed around 21,000 people and caused damage worth $36 billion around the globe. But such Niños come with months of warning, and so much is known about how they happen that governments can prepare. According to the Overseas Development Institute (ODI), however, just 12% of disaster- relief funding(救灾资金) in the past two decades has gone on reducing risks in advance, rather than recovery and rebuilding afterwards. This is despite the evidence that a dollar spent on risk-reduction saves at least two on reconstruction.
Simple improvements to infrastructure ( 基础设施) can reduce the spread of disease. Better sewers (下水道) make it less likely that heavy rain is followed by an outbreak of the disease of bad stomach. Stronger bridges mean villages are less likely to be left without food and medicine after floods. According to a paper in 2011 by Mr. Hsiang and co-authors, civil conflict is related to El Niño’s harmful effects --- and the poorer the country, the stronger the link. Though the relationship may not be causal, helping divided communities to prepare for disasters would at least reduce the risk that those disasters are followed by killing and wounding people. Since the poorest are least likely to make up for their losses from disasters linked to El Niño, reducing their losses needs to be the priority.
1. What can we learn about El Niño in the first paragraph?A.It is named after a South American fisherman. |
B.It takes place almost every year all over the world. |
C.It sees the changes of water flow direction in the ocean. |
D.It forces fishermen to stop catching fish around Christmas. |
A.Agricultural harvests in rich countries fall. |
B.Droughts become more harmful than floods. |
C.Rich countries’ gains are greater than their losses. |
D.Poor countries suffer less from droughts economically. |
A.more investment should go to risk reduction |
B.governments of poor countries need more aid |
C.recovery and reconstruction should come first |
D.victims of El Niño deserve more compensation (补偿) |
A.To introduce El Niño and its origin. |
B.To urge people to prepare for El Niño. |
C.To explain the consequences of El Niño. |
D.To show ways of fighting against El Niño. |