Once a small county in mountains and little-known to the rest of China, Chongli in Hebei Province, where most of the snow sports
2 . On paper, hydrogen（H2）looks like a dream fuel. Coal, oil, and natural gas produce carbon dioxide, which warms the earth when burned, Hydrogen produces pure water. Hydrogen packs more energy into less space than a battery（but certainly less than petrol）. Also, empty tanks（燃料箱）can be refilled with hydrogen much faster than refilling empty batteries with electricity.
While in practice, things are trickier. Storing a meaningful amount of hydrogen gas requires pressing it several hundred-fold. Changing it into the liquid form is another option, but it should be cooled to-253C. Both processes require a heavy and strong tank. While a 700 bar tank is acceptable for a city bus or a truck, adapting it for use in small vehicles is very difficult because the pressure during refilling would be too great.
The solution? Powerpaste.
A German team of researchers, led by Marcus Vogt, have come up with an interesting "powerpaste", which can store hydrogen energy at atmospheric pressure, ready for release when needed. It is so named because it comes in tubes and looks like toothpaste（牙膏）, not in its traditional form of gas.
The main ingredient（原料）of the paste is magnesium hydride, a substance that reacts with water to form hydrogen. The escaped hydrogen can then be directed into a fuel cell, where it reacts with oxygen from the air to produce electric power.
Refueling is very simple, as instead of going to a filling station, drivers and riders can simply replace an empty tube with a new one and refill the water tank.
Given that powerpaste only begins to break down at temperatures of around 250℃ it remains safe even when a vehicle stands in the baking sun for hours.
However, we will have to be patient. Just because researchers have succeeded in developing a new fueling way does not mean that we can expect to see such vehicles on the road anytime soon. It will indeed be several years before this concept is turned into reality.
1. As a fuel, what is the advantage of hydrogen over oil?| A．Refilling empty tanks will be more convenient. |
| B．It is less likely to worsen global warming |
| C．More energy can be packed in the same space. |
| D．It will produce pure water for people to drink. |
| A．The practical difficulties to use hydrogen as fuel in small vehicles. |
| B．The detailed processes of adapting a strong tank in small vehicles. |
| C．The differences in fueling between large vehicles and small ones. |
| D．The tricks of building strong tanks in small vehicles. |
| A．inexpensive | B．powerful | C．convenient | D．environment-friendly |
| A．Powerpaste-driven vehicles sometimes move very slowly on the road. |
| B．Practical use of powerpaste-driven vehicles will not come very soon. |
| C．Powerpaste-driven vehicles can only work after being in the sun for hours |
| D．It will be years before the researchers work out the concept of powerpaste. |
Amsterdam has become very popular with cyclists because of the convenience for bicycles. In the 1960s, a group of cycling fans came up with an idea
Tour Schedule at Red Oak Mountain Ranch (牧场) | ||
| Activities | Things to Note | |
| Friday | ● A “welcome dinner” at 6:00 p.m. in the Lone Star restaurant. ● | ● Wear ● Feel free to bring a camera during the three days. |
| Saturday | ● Horseback riding from ● A country music concert at night. | |
| Sunday | An | |
5 . One day, when I was going to check in at an airport, I noticed there was a big problem. The counter person was telling everyone that all the planes were having problems and they would not be able to fly! And it was suggested that a bus would be provided to take us to Seattle. Everyone was worried, as we only had an hour and a half to make the connecting flight, and the bus was not even at the airport yet.
Finally, the bus pulled up, and the driver said, “They just pulled me out of bed after an all-night shift, and they expect me to get you to Seattle in time to catch your fight. Good luck!”
Needless to say, everyone was in a really bad mood. I was loading my baggage into the bus and had hung my banjo (班卓琴) over my back when the bus driver said, “What? Are you going to play that on my bus?” “Well, I really did not plan on it,” I replied.“I was only kidding,”said the driver. But I started thinking about it, and I pulled out the banjo. A worried, angry woman said, “Well, what if I don’t like it?” “Then tell me and I’ll stop,” I replied.
We drove off, and the tension made the atmosphere inside the bus horrendous! Then I started performing the old standard Blue Skies. In a few minutes, I noticed everyone was singing along. I started to sing, too, and before long, the whole bus burst into song.
One song led to another. Everyone laughed and sang, with food passed around the bus, and before long, the airport was in sight.
The bus driver called, “We made it! We never would have done it without the help of our banjo player.” Shouts of approval rang through the bus. People exchanged addresses and invitations to visit, and a few even exchanged hugs.
A few weeks later, my mailbox was filled with letters from my new friends. Their letters reminded me of how, by reaching out with just a song or a bit of friendship, you can turn a very tense situation into a peaceful experience.
1. What can we learn from paragraph 2?| A．The driver was glad to take them to Seattle. |
| B．The driver was too tired to send them to Seattle. |
| C．The driver was late because he just came off the night shift. |
| D．The driver thought they would have difficulty making it to Seattle. |
| A．Boring. | B．Strange. | C．Terrible. | D．Cheerful. |
| A．A great banjo play. |
| B．A wonderful musical bus ride. |
| C．The amazing friendship on a bus. |
| D．An unforgettable experience at the airport. |
A SydneyPass gives you unlimited and flexible travel on the Explorer Buses: the ‘red’ Sydney Explorer shows you around our exciting city sights while the ‘blue’ Bondi Explorer visits Sydney Harbour bays and famous beaches. Take to the water on one of three magnificent daily harbor cruises (游船). You can also travel free on regular Sydney Buses, Sydney Ferries or CityRail services (limited area), so you can go to every corner of this beautiful city.
Imagine browsing at Darling Harbour, tasting the famous seafood at Watsons Bay or enjoying the city lights on an evening ferry cruise. The possibilities and plans are endless with a SydneyPass. Wherever you decide to go, remember that bookings are not required on any of our services so tickets are treated on a first in, first seated basis.
SydneyPasses are available for 3, 5 or 7 days for use over a 7-calendar-day period. With a 3 or 5-day pass you choose on which days out of the 7 you want to use it. All SydneyPasses include a free Airport Express inward trip before starting your 3, 5 or 7 days, and the return trip is valid for 2 months from the first day your ticket was used.
SydneyPass Fares
| Adult | Child* | Family** | |
| 3-day ticket | $90 | $45 | $225 |
| 5-day ticket | $120 | $60 | $300 |
| 7-day ticket | $140 | $70 | $350 |
**A family is defined as 2 adults and any number of children from 4 to under 16 years of age from the same family.
1. A SydneyPass doesn’t offer unlimited rides on ________.
| A．the Explorer Buses | B．the harbor cruises |
| C．regular Sydney Buses | D．CityRail services |
| A．save fares from and to the airport |
| B．take the Sydney Explorer to beaches |
| C．enjoy the famous seafood for free |
| D．reserve seats easily in a restaurant |
| A．$225. | B．$300. | C．$360. | D．$420. |
A warning system to prevent people from falling asleep while driving
8 . The Intelligent Transport team at Newcastle University have turned an electric car into a mobile laboratory named “Drive LAB” in order to understand the challenges faced by older drivers and to discover where the key stress points are.
Research shows that giving up driving is one of the key reasons for a fall in health and well-being among older people, leading to them becoming more isolated and inactive.
Led by Professor Phil Blythe, the Newcastle team are developing in-vehicle technologies for older drivers which they hope could help them to continue driving into later life.
These include custom-made navigation (导航) tools, night vision systems and intelligent speed adaptations. Phil Blythe explains: “For many older people, particularly those living alone or in the country driving is important for keeping their independence, giving them the freedom to get out and about without having to rely on others.”
“But we all have to accept that as we get older our reactions slow down and this often results in people avoiding any potentially challenging driving conditions and losing confidence in their driving skills. The result is that people stop driving before they really need to.”
Dr Amy Guo, the leading researcher on the older driver study, explains, “The Drive LAB is helping us to understand what the key stress points and difficulties are for older drivers and how we might use technology to solve these problems.”
“For example, most of us would expect older drivers always go slower than everyone else but surprisingly, we found that in 30mph zones they struggled to keep at a constant speed and so were more likely to break the speed limit and be at risk of getting fined. We’re looking at the benefits of systems which control their speed as a way of preventing that.”
“We hope that our work will help with technological solutions to ensure that older drivers stay safer behind the wheel.”
1. What is the purpose of the Drive LAB?| A．To explore new means of transport. | B．To design new types of cars. |
| C．To teach people traffic rules. | D．To find out older driver’s problems. |
| A．It keeps them independent. | B．It helps them save time. |
| C．It builds up their strength. | D．It cures their mental illnesses. |
| A．Ensure their safety with the help of technology. |
| B．Improve their diving skills. |
| C．Provide advice on repairing their cars. |
| D．Organize regular physical checkups. |
| A．A New Model Electric Car | B．Keeping Older Drivers on the Road |
| C．A Solution to Traffic Problems | D．Driving Services for Elders |
Steam engines were used to pull the carriages and it must have been
From Edmonton, the train headed southeast across the great Canadian Prairie. At school, Daiyu and Liu Qian
