更多"[不定项选择题]People in communities have "的相关试题:
[不定项选择题]共用题干
第三篇
People have been painting pictures for at least 30,000 years.The earliest pictures were painted by people who hunted animals.They used to paint pictures of the animals they wanted to catch and kill.Pictures of this kind have been found on the walls of caves in France and Spain.No one knows why they were painted there.Perhaps the painters thought that their pictures would help them to catch these animals.Or perhaps human beings have always wanted to tell stories in pictures.
About 5,000 years ago,the Egyptians and other people in the Near East began to use pictures as kind of writing. They drew simple pictures or signs to represent things and ideas,and also to represent the sounds of their language.The signs there people used became a kind of alphabet.
The Egyptians used to record information and to tell stories by putting picture-writing and pictures together. When an important person died,scenes and stories from his life were painted and carved on the walls of the place where he was buried.Some of these pictures are like modern comic strip stones.It has been said that Egypt is the home of the comic strip.But for Egyptians,pictures still had magic power. So they did not try to make their way of writing simple.The ordinary people could not understand it.
By the year 1000 BC,people who lived in the area around the Mediterranean Sea had developed a simpler system of writing. The signs they used were very easy to write,and there were fewer of them than in the Egyptian system.This was because each sign,or letter,represented only one sound in their language.The Greeks developed this system and formed the letters of the Greek alphabet.The Romans copied the idea and the Roman alphebet is now used all over the world.
These days,we can write down a story,or record information,without using pictures.But we still need pictures of all kinds:drawing,photographs,signs and diagrams.We find them everywhere:in books and newspapers,in the street,and on the walls of the places where we live and work.Pictures help us to understand and remember things more easily,and they can make a story much more interesting.
In the last paragraph,the author thinks that pictures______.
A.should be made comprehensible
B.should be made interesting
C.are of much use in our life
D.have disappeared from our life
[不定项选择题]共用题干
第一篇
Plant Gas
Scientists have been studying natural sources of methane（甲烷，沼气）for decades but hadn't regarded plants as a producer, notes Frank Keppler, a geochemist（地球化学家）at the Max Planck Institute for Nuclear Physics in Heldelberg,Germany. Now Keppler and his colleagues find that plants,from grasses to trees,may also be sources of the greenhouse gas.This is really surprising, because most scientists assumed that methane production requires an oxygen-free environment.
Previously,researchers had thought that it was impossible for plants to make significant amounts of the gas. They had assumed that microbes（微生物）need to be in environments without oxygen to produce methane.Methane is a greenhouse gas, like carbon dioxide.Gases such as methane and carbon dioxide trap heat in Earth's atmosphere and contribute to global warming.
In its experiments, Keppler's team used sealed chambers（室，房间；腔）that contained the same concentration of oxygen that Earth's atmosphere has.They measured the amounts of methane that were released by both living plants and dried plant material,such as fallen leaves.
With the dried plants,the researchers took measurement at temperatures ranging from 30 degrees Celsius to 70 degrees
C.At 30 degrees
C.,they found,a gram of dried plant material released up to 3 nanograms（微克）of methane per hour(One nanogram is a millionth of a gram). With every 10-degree rise in temperature,the amount of methane released each hour roughly doubled.
Living plants growing at their normal temperatures released as much as 370 nanograms of methane per gram of plant tissue per hour. Methane emissions tripled when living and dead plant was exposed to sunlight.
Because there was plenty of oxygen available,it's unlikely that the types of bacteria(bacterium的复数，细菌）that normally make methane were involved. Experiments on plants that were grown in water rather than soil also resulted in methane emissions.That's another strong sign that the gas came from the plants and not soil microbes.
The new finding is an"interesting observation,"says Jennifer Y. King,a biogeochemist（生物地球化学家）at the University of Minnesota in St. Paul. Because some types of soil microbes consume methane,they may prevent plant-produced methane from reaching the atmosphere.Field tests will be needed to assess the plant's influence,she notes.
What is the beneficial point of some microbes consuming plant-produced methane?
A.Methane becomes less poisonous.
B.Methane is turned into a fertilizer.
C.Less methane reaches the atmosphere.
D.Air becomes cleaner.
[不定项选择题]共用题干
To Have and Have Not
It had been boring hanging about the hotel all afternoon.The road crew were playing a game with dollar notes.Folding them into small planes to see whose would fly the furthest.Having nothing better to do,I joined in and won five,and then took the opportunity to escape with my profit. Despite the evil-looking clouds,I had to get out for a while.
I headed for a shop on the other side of the street. Unlike the others,it didn't have a sign shouting its name and business,and instead of the usual impersonal modern lighting,there was an appealing glow inside.Strangely nothing was displayed in the window.Not put off by this,I went inside.
It took my breath away.I didn't know where to look,where to start. On one wall there hung three hand-stitched American quilts that were in such wonderful condition they might have been newly -made .I came across tin toys and antique furniture,and on the wall in front of me,a 1957 stratocaster guitar,also in excellent condition.A card pushed between the strings said $50.I ran my hand along a long shelf of records,reading their titles.And there was more...
"Can I help you?"She startled me.I hadn't even seen the woman behind the counter come in.The way she looked at me,so directly and with such power. It was a look of such intensity that for a moment I felt as if I were wrapped in some kind of magnetic or electrical field.I found it hard to take and almost turned away.But though it was uncomfortable.I was fascinated by the experi- ence of her looking straight into me,and by the feeling that I was neither a stranger,nor strange, to her.
Besides amusement her expression showed sympathy. It was impossible to tell her age.She reminded me faintly of my grandmother because,although her eyes were friendly.I could see that she was not a woman to fall out with .I spoke at last."I was just looking really",I said,though secretly wondering how much of the stuff I could cram into the bus.
The woman turned away and went at once towards a back room,indicating that I should follow her. But it in no way lived up to the first room.The light made me feel peculiar,too.It came from an oil lamp that was hung from the centre of the ceiling and created huge shadows over eve-rything. There were no rare electric guitars,no old necklaces,no hand-painted boxes with deli-cate flowers.It was also obvious that it must have taken years,decades,to collect so much rub-bish,so many old documents arid papers.
I noticed some old books,whose gold lettering had faded, making their titles impossible to read."they look interesting",I said,with some hesitation."To be able to understand that kind of writing you must first have had a similar experience",she said clearly.She noted the confused look on my face,but didn't add anything.
She reached up for a small book which she handed to me."This is the best book I can give you at the moment",she laughed."If you use it."I opened the book to find it full,or rather empty,with blank white pages,but paid her the few dollars she asked for it,becoming embar-rassed when I realised the notes were still folded into little paper planes.I put the book in my pocket,thanked her and left.
The writer disliked the back room because______.
A.there was hardly anything in it
B.she had ordered him to go there
C.he saw nothing he really liked
D.it was too dark to look around
[不定项选择题]资料：Children back at school, nights slowly starting to draw in and the weather more changeable. The seasons are turning and after an eerily calm summer for financial markets, there's a whiff of uncertainty in the air. Bond yields are up from their lows, and the relentless migration of global capital towards any asset, anywhere, with some yield, is slowing.
The concern is the growing awareness of central banks' waning ability to boost growth with ever-lower interest rates and ever-bigger purchases of assets. The debate about if, when and how slowly the US Federal Reserve will raise interest drags on, but if downward pressure on global bond yields from the European Central Bank （EC
B） and the Bank of Japan's （BOJ） largesse is drawing to a close, that's a bigger milestone for markets.
A world of higher bond yields is one where the pressure to seek yield in exotic places is diminished. It's also a world where the capital gains that accompanied falling yields become capital losses and investors question the merit of bonds over cash （or equities）.
This search for yield in exotic places has, since the end of January, helped the Brazilian real gain more than 20% against the US dollar, with the Russian rouble managing almost as much. The dollar, itself, has fallen back is by 7.5% fall in trade-weighted terms, unwinding nearly 40% of the gains it has seen since mind-2014.
There's no need to panic about bond yields rising, because rate rises in Japan or the Eurozone are years away and the Fed's still tinkering. But 10-year yields on both German and Japanese government bond yields fell below zero for the first time in late June. They have been edging higher through the summer. It's almost as if investors really aren't that keen on tying money up at negative yields for that long – why not stick to cash?
In the US, estimates of "neutral" real interest rates are tumbling to around zero. Estimates of how much slack there is left in the labour market are being revised up and after five years when productivity growth has averaged a measly 0.5%, there's widespread acceptance that it's unlikely to accelerate by magic.
But even if we take all of this into account, markets are now pricing in an extraordinarily slow pace of rate hikes by the Fed – from their current 0.25-0.5% range, to about 0.75% by the end of 2017 and to 1% by the end of 2018.
GDP growth still oscillates around 2%, the Fed's favoured measure of inflation is at 1.6% and the unemployment rate is trending lower. The pricing of the future path of short term rates seems too low even for the "new normal" economic environment.
All of these currencies have gained against the pound and I can't see that changing. Too much importance should not be placed on either the collapse in confidence immediately after the vote to leave the EU or the subsequent bounce.
The economic impact of leaving the EU will be felt through delayed investment decisions as a result of uncertainty about when and on what terms it happens. A debilitating rather than a corrosive impact on the economy will be seen in slower, but positive growth. It will also be felt in further （slower） sterling weakness.
The Bank of England has already cut policy rates from 0.5% to 0.25%, and there's more to come from both the Bank and the pound over the next year. A 5% fall from here would take the pound close to €1.1, and we could see it fall below $1.25 as the Federal Reserve edges rates higher.
According to the the passage and the regularity of rate hikes fixed by the fed in the past years，which of the following average percentage of rates will rise each of the coming years?
A.0.75%
B.0.5%
C.0.25%
D.1%
