江苏省扬州中学、泰州中学2018-2019学年高三四模(5月)英语试题 Word版含答案

D.find artificial ways to cool down the extreme weather 59. What does Professor Gail Whiteman mean in the future? A. Extreme weather will be common in the future. B. Climate change will be normal.

C. Extreme weather will be normal, if we don’t take measures. D. Climate change lead to extreme weather.

B

A few things to consider before booking a flight:

With fuel costs rising and airlines finding more fees to impose on travelers every day, airfare isn’t getting any cheaper. Since you can’t drive to all your dream destinations, flying is the only way to go sometimes and, undeniably, the fastest. Luckily, there are plenty of ways to find the most affordable fares and also avoid paying as many extra charges as possible when you plan ahead.

Getting the best fare

Airlines put out their fare sales on Tuesday morning, making this day the best day to book a flight for less.

Fly during the least popular times.

Tuesday, Wednesday and Saturday are the slowest days to fly, which means cheaper deals than the rest of the week. You can also find reduced rates on early morning flights, since many people don’t like to get up before the sun to get to the airport. Earlier boarding times can also considerably cut down your chances of getting bumped on an overbooked flight or delayed because of other delayed flights or mechanical issues. Choose your seat later.

Some airlines charge you to pick your seat when you book online, adding even more to the bottom line of your ticket cost. If you show up early on your travel day, you can still get suitable seats. Some of the best seats get held back until flight day, unless others are willing to pay extra for them ahead of time, so you still have the chance at one of those. Fly on holidays.

You already know that summer is the most expensive time to fly, and even though most other times are more affordable, the days surrounding holidays can be crazy. Save big if you’re willing to travel on major holidays, such as Thanksgiving and Christmas. Don’t wait until the last-minute to book.

Many travelers don’t know that there’s a sweet spot for booking and getting the best price on your tickets. Book too early or too late and you could end up paying more than you need to. The best time to book is between three months and six weeks from when you want to travel. Avoiding extra fees

Airlines will charge for just about anything these days. Some have even toyed around with charging customers for using the restroom. All those extra fees can certainly add up, but there’s no reason to pay them if you don’t have to. Here are some tips to keep money in your wallet once you get to the airport. Avoid the upgrade it's not necessary.

Sometimes upgrades are free, but mostly you will be charged for seeking a last-minute bump to first class, and the cost can be hefty. Fly carry-on only.

Baggage fees vary wildly, but almost all airlines charge them and charge big. Why pay for your clothes to fly with you? If everyone in your travel party checks a bag, your bill can be astronomical before you ever even get to your destination. It’s easy to reduce the amount of stuff you pack: Make sure all your clothing coordinates, so you can take less and still make more outfit combinations, take only two pair of shoes, plan to do a bit of laundry on your trip and bring only travel-sized toiletries. Pack your own snacks.

Unless you’re flying internationally, it’s rare your flight comes with a free meal. Snacks on the plane are not cheap and almost never healthy. Don’t rely on what’s on the small menu and instead tuck some of your own snacks – granola bars, homemade muffins, fruit and trail mix all make fantastic travel foods – into your bag and eat a lot better, and cheaper, than other passengers.

Do you have a tried and true method of getting the best deal on your flights? Let us know.

60.To save money, which one should NOT be the choice?

A.Early morning flights B.Early boarding times

C. The flights on Saturday D.The flights on Summer holiday 61. According to the passage, which one is right?

A. If you show up early on your travel day, you can get the best seats. B. You can save big if you’re willing to travel on Christmas eve. C. You will be charged for seeking the upgrades, and the cost can be high. D. If you’re flying internationally, your flight will come with a free meal. 62.According to the passage, you can do the things except_____ to avoid extra fees. A. Use the restroom. B. Tuck your own snacks C. Fly with carry-on only. D. Avoid the upgrade.

C

The relationship between exercise and cancer has long both intrigued and puzzled oncologists and exercise physiologists.

Exercise is strongly associated with lowered risks for many types of cancer. At the same time, exercise involves biological stress, which typically leads to a short-term increase in inflammation（发炎） which can contribute to higher risks for many cancers.

Now, a new study in mice may offer some clues into the exercise-cancer paradox. It suggests that exercise may change how the immune system deals with cancer by boosting adrenaline（肾上腺素）, certain immune cells and other chemicals that, together, can reduce the severity of cancer or fight it off altogether.

To try to better understand how exercise can both elevate inflammation and simultaneously protect the body against cancer, scientists at the University of Copenhagen in Denmark and other institutions decided to closely examine what happens inside mice at high risk for the disease.

So, for the new study, they began by gathering a group of adult lab mice. These animals generally like to run.

The scientists then implanted melanoma(黑素瘤) skin cancer cells into the mice before providing half of them with running wheels in their cages while the other animals remained sedentary. After four weeks, far fewer of the runners had developed full-blown melanoma than the sedentary mice and those that had been diagnosed with the disease showed fewer and smaller lesions.

They drew blood from both the exercising and sedentary animals and cells from any tumors in both groups. As expected, they found much higher levels of the hormone adrenaline in the blood of the exercising animals, especially right after they had been working out on the wheels but also at other times of the day. The body releases adrenaline in response to almost any type of stressful experience, including exercise. They also found higher levels of interleukin-6 in the blood of the runners. This is a substance that is released by working muscles and is believed to both increase and decrease inflammation in the body, depending on where and how it goes to work. Perhaps most important, they found much higher numbers in the bloodstreams of runners than in the sedentary mice of a type of immune cell named natural killer cells that are known to be strong cancer fighters.

So the scientists repeated their original experiment multiple times, inducing cancer while allowing some mice to run and others to sit. In some of these follow-up experiments, the scientists injected the runners with a substance that blocked the production of adrenaline and gave sedentary animals large doses of added adrenaline. What they now found was that when running mice could not produce adrenaline, they developed cancer at the same rate as the sedentary animals, while the sedentary animals that had been injected with extra adrenaline fought off their tumors better than other sitting mice.

More remarkably, the scientists determined that adrenaline seemed to be sending biochemical signals to some of the animals’ IL-6 cells, making them physiologically more alert, so that when a tumor began to develop in the affected animal, those IL-6 cells in turn activated the natural killer cells in the bloodstream and actually directed them to the tumors, like minute guide fish.

With these results, “we show that voluntary wheel running in mice can reduce the