题目内容
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[单选题]
In gasoline engines（）are used to ignite the fuel-air mixture,producing the power.
A.3-side rotor
B.gasoline
C.spark plugs
D.diesel
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题目内容
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题目内容
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A.3-side rotor
B.gasoline
C.spark plugs
D.diesel
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更多“In gasoline engines（）are used …”相关的问题
A.alternatives
B.accessories
C.artifacts
D.attributes
说明下述各项中每一对之间哪个更富有价格弹性:
(1)某一特定品牌牙膏的需求与普通牙膏的需求;
(2)短期内汽油的需求与长期内汽油的需求。
Explain which of the following items in each pair is more price elastic.
a. The demand for a specific brand of toothpaste and the demand for toothpaste in general
b. The demand for gasoline in the short run and the demand for gasoline in the long run
A. settling
B. centrifugal purifiers
C. blending
D. heating
A.Titanic is equipped with three main engines—two reciprocating four-cylinder, triple-expansion steam engines
B.Titanic is said to be the most luxurious one ever floating in the ocean
C.Titanic has enough life boats for every passenger on board
D.Titanic has advanced safety features such as watertight compartments and remotely activated watertight doors
听力原文：W: Hi, Mike.
M: Hi. I'm surprised to see you on the city bus. Why not drive your car？
W: (23)I've been thinking about the environment lately. If we all use public transportation when we could, the air will be much cleaner.
M: Right. But the bus isn't exactly pollution free.
W: True. But they'll be running a lot cleaner soon, We were just talking about that in my environmental engineering class.
M: What's the city going to do？ Install pollution filters of some sort on their buses？
W: They could, but those filters make the engines work harder and really cut down on fuel efficiency. Instead they found a way to make their engines more efficient.
M: How？
W: Well, (24)there is a material called the coniine oxide. It's a really good insulator. And a thick coat of it gets sprayed on the certain part of the engine.
M: An insulator？
W: Yes. (25)It reflects back the heat of burning fuel. So the fuel will burn much hotter and burn up more completely.
M: So a lot less unburned fuel comes out to pollute the air, right？
W: Yeah, and the bus will need less fuel. So with the savings on fuel cost, they say this will all pay for itself in just six months.
M: Sounds like people should all go out and get this stuff to spray their car engines.
W: Well, not really that easy. To melt the materials before you can spray a coat of it on the engine parts, you first have to heat it over 10,000 degrees. It's not something we are able to do ourselves.
(20)
A．Something is wrong with her car.
B．The cost of the fuel is high.
C．It's cheap to take bus.
D．She thinks public transportation is environmental friendly.
Oil prices have raised overall consumer prices and cut into household purchasing power. So far the higher costs haven't deterred(阻止) buying, even buying of cars and other energy-sensitive items. The major reason for the lack of reaction is that oil is less important to the economy than it once was. Oil, which produced 45% of world energy in 1971, accounted for only 35% in 2003, with increases in nuclear and natural gas use making up the difference.
GM, Ford, and Chrysler suffered as buyers shifted to more fuel-efficient vehicles from Toyota and Honda, but the shift was hot pronounced. Admittedly, light truck sales are holding up in part because manufacturers are offering large discounts to "move the metal", but the fact that buyers are responding to those incentives shows they aren't too scared of gas prices.
Americans continue to spend more than they earn, but gasoline prices will have an effect. Although the April chain store results suggest gasoline prices aren't hurting much yet, eventually Americans will be forced to realize that they have to slow down. We expect the economy to slow in the second half of the year as the impact of higher oil prices sinks in. How much the economy slows will depend on how high oil prices remain. We expect some drop in oil prices by yearend, but I have been saying that for so long even I am starting not to believe it.
The anger against the oil companies is clearly misplaced. Exxon and friends control only a small share of world oil reserves. Most are now in the hands of state-owned oil companies. The recent move by Bolivia to nationalize its industry is only the latest in a long line of similar actions. The history of these enterprises is one of severe underinvestment and mismanagement, which tends to reduce supply and keep prices high. The risk on oil prices is primarily on the high side of our forecast.
Although I think oil prices will drop back in the medium term, to address my serious worries, I'm buying my wife a bike for Mothers' Day.
The economy at the beginning of 2006 is not affected by the high oil price mainly because ______.
A．the warm winter requires less oil to run the heaters
B．the warm winter promotes consumption, across the country
C．people believe that the oil price will drop in near future
D．people don't think the high price will make much of a difference
Impressive and complex 13 it may appear, the rocket, which was invented in China over 800 years 14 , is a relatively simple device.Fuel that is burned in the rocket engine changes 15 gas.The hot and rapidly expanding gas must escape, but it can do so only 16 an opening that faces backward.As the gas is 17 with great force, it pushes the rocket in the 18 direction.Like the kick of a gun when it is fired, it 19 the laws of nature described by Sir Isaac Newton when he discovered that“ 20 every action, there is an equal and opposite reaction.”
11.A.shown
B.been
C.appeared
D.proved
12.A.send
B.land
C.take
D.carry
13.A.that
B.so
C.as
D.sometimes
14.A.in advance
B.before
C.earlier
D.ago
15.A.as
B.into
C.for
D.the
16.A.in
B.at
C.by
D.through
17.A.transmitted
B.dispersed
C.erected
D.radiated
18.A.same
B.other
C.opposite
D.wrong
19.A.states
B.proves
C.follows
D.breaks
20.A.like
B.as
C.with
D.for
She sat in her seat, her hands gripping its arms, her seat belt already fastened. The air hostess was talking, telling everyone what to do in case of emergency, showing them where their .life-jackets were. The plane was crowded, every seat was full. From her window seat, getting out in a hurry would be impossible, thought Ann. In any case who would want to get out of a plane in mid-air？
The engines began to shake--the noise increased till it was like a great rushing wind. She looked out to see the runway slip past at astonishing speed. She wanted to cry out--to stop the plane before it left the ground, but she knew she was trapped in this great roaring machine. I must scream, she told herself, and put her hands over her eyes.
There was a strange feeling as if she were going up in a lift. The noise died down. Carefully she opened her eyes. Through the window she saw a great carpet of cloud above, so beautiful that she stared in wonder, hardly turning away from the window till they touched down.
Ann thought she would be frightened because ______.
A．she had never flown before
B．she had a fear of being in high places
C．she hadn' t made proper preparations.
D．she was naturally timid
sports retailing business in the UK has undergone a major change over the past ten years. First of all the supply side
has been transformed by the emergence of a few global manufacturers of the core sports products, such as training
shoes and football shirts. This consolidation has made them increasingly unwilling to provide good service to the
independent sportswear retailers too small to buy in sufficiently large quantities. These independent retailers can stock
popular global brands, but have to order using the Internet and have no opportunity to meet the manufacturer’s sales
representatives. Secondly, UK’s sportswear retailing has undergone significant structural change with the rapid growth
of a small number of national retail chains with the buying power to offset the power of the global manufacturers.
These retail chains stock a limited range of high volume branded products and charge low prices the independent
retailer cannot hope to match.
Good Sports has survived by becoming a specialist niche retailer catering for less popular sports such as cricket,
hockey and rugby. They are able to offer the specialist advice and stock the goods that their customers want.
Increasingly since 2000 Good Sports has become aware of the growing impact of e-business in general and e-retailing
in particular. They employed a specialist website designer and created an online purchasing facility for their
customers. The results were less than impressive, with the Internet search engines not picking up the company
website. The seasonal nature of Good Sports’ business, together with the variations in sizes and colours needed to
meet an individual customer’s needs, meant that the sales volumes were insufficient to justify the costs of running
the site.
Bob, however, is convinced that developing an e-business strategy suited to the needs of the independent sports
retailer such as Good Sports will be key to business survival. He has been encouraged by the growing interest of
customers in other countries to the service and product range they offer. He is also aware of the need to integrate an
e-business strategy with their current marketing, which to date has been limited to the sponsorship of local sports
teams and advertisements taken in specialist sports magazines. Above all, he wants to avoid head-on competition
with the national retailers and their emphasis on popular branded sportswear sold at retail prices that are below the
cost price at which Good Sports can buy the goods.
Required:
(a) Provide the partners with a short report on the advantages and disadvantages to Good Sports of developing
an e-business strategy and the processes most likely to be affected by such a strategy. (12 marks)
