Transport has a lot to answer for when it com...

Transport has a lot to answer for when it comes to harming the planet. While cars and trains are moving towards greener, electric power, emissions from air travel are expected to increase massively by 2050. If we want big green sky solutions, we need blue sky thinking. Fortunately, there's plenty of that happening right now, particularly the short-haul flights powered by batteries.

Harbour Air is the largest seaplane airline in North America, flying 30, 000 commercial flights in 40 seaplanes each year. Significantly, all Harbour Air routes last less than 30 minutes, making it perfectly fit for electric engines. “As an airline, were currently in the process of turning all our planes into electric airplanes. ” says CEO Greg McDougall. To make this happen, the airline has partnered up with MagniX to create the world's first commercial flight with an electric engine.

Making the skies electric isn't just good for the environment, it also makes sound financial sense: a small aircraft uses $400 on conventional fuel for a 100-mile flight, while an electric one costs $8-12 for the same distance, and that's before you factor in the higher maintenance costs of a traditional engine. There's also the added bonus that electric planes are just much more pleasant to fly in. No loud engine noise, no smell of fuel, just environmentally friendly peace and quiet.

While there has been real progress in the e-plane industry, the technical challenges that remain are keeping everyone's feet firmly on the ground. A battery, even a lithium one, only provides 250 watt-hours per kilogram; compare this to liquid fuel, which has a specific energy of 11, 890 watt-hours per kilogram. Carrying adequate batteries, however, would make the plane too heavy to get off the ground. In aircraft, where every bit of weight counts, this can't just be ignored.

The transition (过渡) from gas to electric in the automobile industry has been made easier by hybrids-vehicles powered by both fuel and electricity. Many believe the same patter could be followed in the air. Fuel consumption could be reduced as the electric component is switched on at key parts of the journey, especially on take-off and landing.

It's certainly an exciting time for electric flying. With companies like Harbour Air taking the lead, battery-powered planes, especially on short-haul journeys, are set to become a reality in the next few years.

1.According to Para. 1, what is happening in air transport?

A.New explorations of the sky are being launched.

B.Pollution caused by batteries is being controlled.

C.Efforts are being made to make air travel greener.

D.Demand for short-haul flights is increasing massively.

2.Why is Harbour Air fit for electric flights?

A.It runs short routes.

B.It has a strong partner.

C.Its planes can land on the sea.

D.It has planes with powerful engines.

3.The expression "added bonus" refers to the fact that electric planes_________.

A.give passengers more pleasant views

B.bring airlines more financial benefits

C.offer more enjoyable flying experiences

D.cost less in maintenance than traditional ones

4.What might be the biggest challenge of electric flying?

A.To improve the ground service for e-planes.

B.To find qualified technicians for e-plane industry.

C.To calculate the energy needed to power e-planes.

D.To balance power and weight of batteries in e-planes.

5.What could be done during the transition from gas to electric in air flight?

A.To produce new electric components.

B.To increase battery consumption.

C.To use mixed-power technology.

D.To expand the landing field.

6.What is the author's attitude towards the prospect of electric flying?

A.Short-sighted. B.Wait-and-see.

C.Optimistic. D.Skeptical.

高三英语阅读理解困难题查看答案及解析

When it comes to bucket-list（遗愿清单） adventures, swimming with sharks is near the top for a lot of adrenaline junkies. Many of the adventures on the list require scuba diving, but at some locations, even non-divers with a desire to get up close and personal with the top of the food chain can jump in and face their fears.

Bahamas

I don't want to scare the non-shark lovers away from the beauty of the Bahamas, but there are sharks out there. From least scary to the most, here's where to get your Bahamian shark fix.

Compass Cay Marina is home to a large number of well-fed, friendly nurse sharks. In case you don't know it, a nurse shark is more like a giant catfish than a great white. You can walk right into the shallow water near the fish-cleaning station and pet these gentle guys.

Stuart Cove's in Nassau has been doing shark dives safely for decades. Caribbean reef sharks feed on fish-on-a-stick as divers kneel in the sand in awe. Reef sharks are some of the least aggressive species of shark.

As your fear subsides and you crave more sharks and more excitement, check out the folks at Jim Abernethy's Scuba Adventures in Fort Lauderdale. They operate live-aboard dive boats with regularly scheduled shark trips in the Bahamas. Expect to see tigers and hammerheads, as well as the Caribbean reef sharks.

Hawaii

There are several shark species in the Pacific waters surrounding the Hawaiian Islands. Sightings of tigers, hammerheads, blues, and even great whites are not all that uncommon.

And While divers can expect to see these guys almost anywhere while diving in Hawaii, the Oahu's North Shore is the place to be for cage diving. Hawaii Shark Encounters takes shark education seriously and strives to educate customers about the need for shark conservation while providing a thrilling swim with sharks inside the safety of a cage. No diving skills are required－just bring your courage.

Fiji

Scuba diving in Fiji is a definite bucket-list adventure for many divers－and the fish many hope to see most is shark. Beqa Adventure Divers can make that happen for you. Sharks are protected in the Shark Reef Marine Reserve, so no worries about questionable practices. This is an uncaged dive, but per the company's website, it is a carefully managed feed, where participants observe, but do not interact（互动） with the sharks.

Guadalupe Island

Home to a large population of great whites, the waters off the Mexico's Baja coast, attract divers willing to brave cold Pacific waters for some time in a cage watching the top fish of the ocean

Nautilus Live Aboards operates six-day adventures from July to November using submersible（能在水下操作的） cages that descend to about 9 meters for a better opportunity to observe the sharks. You meet the expedition in San Diego, motor to Ensenada, cruise to Guadalupe, then spend three full days in the cages watching the predators. Non-divers are allowed, as air is supplied by hoses attached to the boat, but a minimum of a Discover Scuba course is recommended.

1.How many kinds of sharks are mentioned in this passage?

A. Three.　　 B. Four.

C. Five.　　 D. Six.

2.According to the passage, where can you interact with sharks?

A. In Bahamas.　　 B. In Hawaii.

C. In Fiji.　　 D. In Guadalupe Island.

3.We can learn from the text that      　　　　 .

A. great whites can be seen mostly in Bahamas

B. caged diving is safer than uncaged diving

C. tigers are more dangerous than reef sharks

D. skills as well as courage are needed for cage diving in Hawaii

高三英语阅读理解中等难度题查看答案及解析

Human civilization has truly come a long way．From using animals for transport to the super fast automobiles that we have today．From using flint to making fire to using one touch lighters．But there are some things that we will never let go of．Some ancient traditions that have been brought down through the ages are still followed today．

Groundhog Day(土拔鼠节)，falls on the 2nd of February every year．It is observed in the United States and Canada．While this day may be a public holiday and a bank holiday，it is not a compulsory holiday declared by the government．But this is not so for all the states．State-wise holidays may vary．

Ever heard of Punxsutawney Phil? Groundhog Day is observed because of this groundhog．The day is indeed about a groundhog．Punxsutawney is the name of an apparently weather forecasting groundhog．He lives in his burrow(洞穴)on Gobler’s Knob，Punxsutawney in Pennsylvania，for a short period before the 2nd of February every year．On the 2nd of February，Phil comes out from his burrow and looks for his shadow．If he sees his shadow and goes back into the burrow，then America will have an extended winter of six weeks，But if he cannot see his shadow，and he remains outside．It means winter will soon end and spring will arrive very shortly .Phil has been‘predicting’the length of winter in this manner for almost a century and they have always been almost 100％ accurate．　　

Groundhog Day is celebrated in some parts of the USA and Canada．The largest celebration is held at Punxsutawney，Pennsylvania．People come in scores to visit Punxsutawney Phil．They wait eagerly, camping days in advance，to see the small groundhog appear from his burrow，check for his shadow and either go back in or stay out．People cheer when they hear it is time for winter to end and celebrate by eating sweets and singing and dancing．Today．the Groundhog Day is a widespread tradition and an exciting event．

1.People celebrate Groundhog Day because ______________.

A．some sweets are provided on Groundhog Day

B．more and more people love groundhogs

C．the groundhog predicts the beginning of spring

D．Punxsutawney Phil is worth respecting

2.What does the author intend to tell us in Paragraph 1？

A．Human civilization has a long history．

B．Some old traditions should be carried on．

C．Human civilization develops very fast．

D．Some old traditions have disappeared．

3. We learn from the passage that Punxsutawney Phil ____________．

A．forecasts the weather based on his shadow

B．witnesses the history of human development

C．organizes celebrations on Groundhog Day

D．gives performances on Groundhog Day

4.We may infer from the passage that ________________．

A．groundhogs will replace TV weathermen soon

B．groundhogs can forecast the weather accurately

C．Groundhog Day is becoming popular in the US and Canada

D．a longer shadow of a groundhog indicates a longer winter

5.Which of the following statements is true according to the passage?

A. Winter will end if the groundhog goes back into the burrow.

B．Groundhog Day is a compulsory’holiday in the US and Canada．

C．A groundhog will remain outside if he sees his shadows on 2nd，Feb．

D．The celebration in Punxsutawney attracts large numbers of visitors．

高三英语阅读理解中等难度题查看答案及解析

短文改错

Beijing has lots of famous tourist attractions. Every year many tourist come here to enjoy its beautiful scenery and rich culture. But several years ago, visitors behave badly. Some talked loudly in public and threw litter everywhere. Some picked flowers, cutting down trees and hurt animals. And even better, some painted on the walls and smoked in the woods.

Luckily, things has changed. Rubbish is always put into dustbins. People are friendly at animals. Everybody smokes in the woods. All these changes make us happily. As student, I think we should know it's our duty to protect the environment. Let's to change our behavior when we travel.

高三英语短文改错中等难度题查看答案及解析

Many people think of guys as being carefree when it comes to their appearance. But in fact, a lot of guys spend plenty of time in front of the mirror. They care just as much as girls do about their body image.

Body image is a person’s opinions and feelings about his or her own body and　 physical appearance._ 1.__You appreciate your body for its capabilities(能力) and accept its imperfections.

_2.__Here are some ideas：

Recognize your strengths.Different body types are good for different things. What does your body do well? Maybe your speed, strength, or coordination (协调性) makes you better than others at a certain sport. That may be basketball, table tennis, mountain biking, dancing, or even running. Or perhaps you have non­sports skills, like drawing, painting, singing, playing a musical instrument, writing, or acting._ 3.__

Exercise regularly. Exercise can help you look good and feel good about yourself. Good physiques (体形) don’t just happen._ 4.__A healthy habit can be as simple as exercising 20 minutes to 1 hour three days a week. Working out can also lift your spirits.

Respect your body! Practicing good habits regular showering; taking care of your teeth, hair, and skin; wearing clean clothes, and so on—can help you build a positive body image.

__5._Your body is just one part of who you are. Your talent for comedy，a quickwit (智慧), and all the other things make you unique. So try not to let small imperfections take over.

A．Use this as an opportunity to discover what you’re good at.

B．Be yourself.

C．Having a positive body image means feeling satisfied with the way you look.

D．Just explore talents that you feel good about.

E．They take hard work, regular workouts, and a healthy diet.

F．The good news is that self­image and body image can be changed.

G．So, what can you do to develop a positive body image?

高三英语信息匹配中等难度题查看答案及解析

Many people think of guys as being carefree when it comes to their appearance. But in fact, a lot of guys spend plenty of time in front of the mirror.71.

Body image is a person’s opinions and feelings about his or her own body and physical appearance. 72. You appreciate your body for its capabilities and accept its imperfections.

So, what can you do to develop a positive body image? Here are some ideas:

Recognize your strengths. Different body types are good for different things. What does your body do well? Maybe your speed, strength, or coordination makes you better than others at a certain sport. That may be basketball, table tennis, mountain biking, dancing, or even running. Or perhaps you have non-sports skills, like drawing, painting, singing, playing a musical instrument, writing, or acting. 73.

Exercise regularly. Exercise can help you look good and feel good about yourself. Good physiques (体形) don’t just happen. 74. A healthy habit can be as simple as exercising 20 minutes to one hour three days a week. Working out can also lift your spirits.

Respect your body! Practicing good habits --- regular showering; taking care of your teeth, hair, and skin; wearing clean clothes, and so on --- can help you build a positive body image.

75. Your body is just one part of who you are. Your talent for comedy, a quick wit (智慧), and all the other things make you unique. So try not to let small imperfections take over.

E. They take hard work, regular workouts, and a healthy diet.

F. The good news is that self-image and body image can be changed.

G. Having a positive body image means feeling satisfied with the way you look.

高三英语信息匹配中等难度题查看答案及解析

Many people think of guys as being carefree when it comes to their appearance. But in fact, a lot of guys spend plenty of time in front of the mirror. They care just as much as girls do about their body image.

Body image is a person’s opinions and feelings about his or her own body and physical appearance. 1.You appreciate your body for its capabilities and accept its imperfections.

2. Here are some ideas.

Recognize your strengths.

Different body types are good for different things. What does your body do well? Maybe your speed, strength, or coordination makes you better than others at a certain sport. That may be basketball, table tennis, mountain biking, dancing, or even running. Or perhaps you have non-sports skills, like drawing, painting, singing, playing a musical instrument, writing, or acting. 3..

Exercise regularly.

Exercise can help you look well and feel good about yourself. Good physiques (体形) don’t just happen. 4.A healthy habit can be as simple as exercising 20 minutes to 1 hour three days a week. Working out can also lift your spirits.

Respect your body.

Practicing good habits - regular showering; taking care of your teeth, hair, and skin; wearing clean clothes, and so on can help you build a positive body image.

5.

Your body is just one part of who you are. Your talent for comedy, a quick wit (智慧), and all the other things make you unique. So try not to let small imperfections take over.

A. Be yourself.

B. Just explore talents that you feel good about.

C. So, what can you do to develop a positive body image?

D. Use this as an opportunity to discover what you’re good at.

E. The good news is that self-image and body image can be changed.

F. They take hard work, regular workouts, and a healthy diet.

G. Having a positive body image means feeling satisfied with the way you look.

高三英语阅读理解中等难度题查看答案及解析

Many people think of guys as being carefree when it comes to their appearance. But in fact, a lot of guys spend plenty of time in front of the mirror. They care just as much as girls do about their body image.

Body image is a person’s opinions and feelings about his or her own body and physical appearance. 1. You appreciate your body for its capabilities and accept its imperfections. 2. Here are some ideas.

Recognize your strengths.

Different body types are good for different things. What does your body do well? Maybe your speed, strength, or coordination makes you better than others at a certain sport. That may be basketball, table tennis, mountain biking, dancing, or even running. Or perhaps you have non-sports skills, like drawing, painting, singing, playing a musical instrument, writing, or acting. 3.

Exercise regularly.

Exercise can help you look well and feel good about yourself. Good physiques(体形) don’t just happen. 4. A healthy habit can be as simple as exercising 20 minutes to I hour three days a week. Working out can also lift your spirits.

Respect your body.

Practicing good habits-regular showering; taking care of your teeth, hair, and skin; wearing clean clothes, and so on-can help you build a positive body image.

5.

Your body is just one part of who you are. Your talent for comedy a quick wit (智慧), and all the other things make you unique. So try not to let small imperfections take over.

A. Be yourself.

B. Just explore talents that you feel good about.

C. So, what can you do to develop a positive body image?

D. Use this as an opportunity to discover what you’re good at.

E. The good news is that self-image and body image can be changed.

F. They take hard work, regular workouts, and a healthy diet.

G. Having a positive body image means feeling satisfied with the way you look.

高三英语七选五中等难度题查看答案及解析

Many people think of guys as being carefree when it comes to their appearance. But in fact, a lot of guys spend plenty of time in front of the mirror. They care just as much as girls do about their body image.

Body image is a person's opinions and feelings about his or her own body and physical appearance.　 1. You appreciate your body for its capabilities and accept its imperfections.

2. 　 Here are some ideas.

Recognize your strengths. Different body types are good for different things. What does your body do well? Maybe your speed, strength, or coordination makes you better than others at a certain sport. That may be basketball, table tennis, mountain biking, dancing, or even running. Or perhaps you have non-sports skills, like drawing, painting, singing, playing a musical instrument, writing, or acting. 3.

Exercise regularly. Exercise can help you look well and feel good about yourself. Good physiques (体形) don’t just happen. 　 4. 　 A healthy habit can be as simple as exercising 20 minutes to 1 hour three days a week. Working out can also lift your spirits.

Respect your body! Practicing good habits regular showering; taking care of your teeth, hair, and skin; wearing clean clothes, and so on can help you build a positive body image.

5. 　 Your body is just one part of who you are. Your talent for comedy a quick wit (智慧) and all the other things make you unique. So try not to let small imperfections take over.

A. Use this as an opportunity to discover what you’re good at.

B. Be yourself.

C. Having a positive body image means feeling satisfied with the way you look.

D. Just explore talents that you feel good about.

E. They take hard work, regular workouts, and a healthy diet.

F. The good news is that self-image and body image can be changed.

G. So, what can you do to develop a positive body image?

高三英语七选五中等难度题查看答案及解析

---John has put forward______ most challenging question for us to answer.

---Yes, it really is. I have never heard______ harder one.

A. a; the　　 B. the; the　　 C. a; a　 D. the; a

高三英语单项填空中等难度题查看答案及解析