Some people sit outside for hours without get...

Some people sit outside for hours without getting bitten by mosquitoes, but it always seems like you’re being eaten alive within minutes of stepping outdoors.

If this is you, you’re not alone. According to Smithsonian Magazine, around 20 percent of people in the world are especially tasty to mosquitoes. What about these people makes mosquitoes’ mouths water?

A popular myth claims that mosquitoes prefer certain blood types, but the fact is that they simply can’t tell what your blood type is from a faraway place. Jonathon Day, a professor of medical entomology (昆虫学) at the University of Florida in the US, told NBC it’s not complicated. “The two most important reasons a mosquito is attracted to you have to do with sight and smell.”

Mosquitoes are especially active in the late afternoon. While flying along, they use their sense of smell to find possible targets. They find victims (攻击对象) by smelling the carbon dioxide (CO2) breathed out by humans and animals. That’s why you commonly find them in crowded streets and parks.

Joop van Loon, an entomologist at Wageningen University in the Netherlands, told Live Science, “Mosquitoes start orienting (使......朝向) themselves to carbon dioxide and keep flying upwind as they sense higher concentrations (浓度).”

As a result, people who simply exhale (呼出) more of the gas over time – generally, larger people – have been shown to attract more mosquitoes than others. “This is why kids don’t get bitten as much ... as adults,” US professor Ted Rosen told Science Alert.

This love for CO2 can also put pregnant women at increased risk for mosquito bites, as they tend to exhale 21 percent more CO2 than people of the same age and size who aren’t pregnant.

In addition to carbon dioxide, the color of the clothes you wear also plays a role in attracting mosquitoes.

According to Live Science, mosquitoes can lock onto targets from up to 50 meters away. At this distance, what we wear has a huge effect. Due to their vision (视觉), people wearing dark colors are more likely to become targets.

Being bitten by mosquitoes is annoying, but don’t worry. Some simple tips can help ward them off. Scientists recommend that we use insect repellent (驱虫剂) and wear light-colored clothing.

1.How do mosquitoes locate their targets, according to the article?

A.By seeking out bright clothes.

B.By identifying different blood types.

C.By sensing an increase of carbon dioxide.

D.By following bigger crowds.

2.Why are pregnant women more likely to be bitten by mosquitoes?

A.Their larger size helps mosquitoes to see them.

B.They breathe out more CO2.

C.They are more likely to sweat.

D.Their body temperatures are higher.

3.How does the article advise you to avoid mosquitoes?

A.Exercise regularly.

B.Wear light-colored clothing.

C.Keep your skin dry and clean.

D.Stay indoors in the evening.

4.What’s the article mainly about?

A.A new finding about mosquitoes.

B.How people can avoid mosquito bites.

C.A popular myth about mosquitoes.

D.Why some people are more attractive to mosquitoes than others.

高三英语阅读理解中等难度题查看答案及解析

Some retired people have nothing to do. They often get together and ___for hours talking about their past experiences.

高三英语单项填空中等难度题查看答案及解析

When he was old, Mr Smith _____ sit for hours without saying anything.

高三英语单项填空简单题查看答案及解析

After supper she would sit down by the fire, sometimes for ____ an hour, thinking of her young and happy days.

A. as long as　　　　　　 B. as soon as　　　　　　 　　　　　　　　　 C. as much as　　　　　　 　　　　　　　　　 D. as many as

高三英语单项填空简单题查看答案及解析

People in the United States have many ways to get news, some of which are available 24 hours a day. In a recent survey（调查）, about 15 percent of American interviewees said that they spend less than one-half to two hours per day watching, listening to, or reading the news. News comes from every source, not only from printed ways, but from TV, radio, and the Internet as well.

With the increased availability of news, serious questions have been raised about the role of the news media in society. Should the media report every detail about every story, even when the information does not seem timely or valuable? Some researchers are concerned that by focusing on everything at once, the media increasingly ignore the more important social, political and economic problems that we face. We cannot concentrate on what’s important by reading about what is not. One extreme example of this is the type of information covered by the tabloid（小报）media, which focus on negative stories of violence and crime.

How can people deal with all the news that is available to them? Some become “news resisters” and choose to turn their backs on news, resisting their desire to turn on the TV and read the paper every day. They argue that although daily news reports may provide us with many facts, they do not include the background or some information that we need to understand news events. They suggest that, instead of daily reports, we look for information that has more in-depth analysis of the news, such as monthly magazines.

1.What percentage of the interviewees spend less than one half to two hours per day paying attention to the news? (within 3 words)

2.According to the researchers, what is the disadvantage of news media? (within 6 words)

3.How do you describe tabloid media? (within 5 words)

4.Who are “news resisters”? (within 9 words)

5.What information does “news resisters” look for? (within 2 words)

高三英语其他题中等难度题查看答案及解析

For many people, leisure time is an opportunity to get outdoors, have some fun and meet interesting people. Add two pieces of advanced 21st century technology — global positioning system (GPS) devices and the Internet — to get “geocaching”.

The word geocaching comes from “geo” (earth) and “cache” (hidden storage). Geocachers log onto a website to find information about the location of a cache — usually a waterproof plastic box containing small items such as toys and CDs — along with a notebook where “finders” can enter comments and learn about the cache “owner”, the person who created and hid the cache. Finders may take any of the items in the cache but are expected to replace them with something of similar value. They then visit the website again and write a message to the owner.

Geocaching became possible on May 1, 2000, when a satellite system developed by the U.S. Department of Defense was made public. Using an inexpensive GPS device, anyone on earth can send a signal to the satellites and receive information about their position. This is basically a high-tech version of orienteering, the traditional pastime which uses maps and compasses instead of GPS to determine one’s location.

Geocachers are a very considerate group. Owners carefully choose a cache’s location to give finders an enjoyable experience, such as a beautiful view or a good campsite. They also consider the environmental impact of their cache since it could result in an increased number of visitors to an area. As for the content of the caches, owners and finders must only use items that are suitable for the whole family, as caches are found by geocachers of all ages.

1.According to the passage, geocaching is __________.

A. an outdoor leisure activity

B. a new type of technology

C. a game used to teach geography

D. a program to protect environment

2.How can finders learn about the cache owners?

A. By meeting them.　　　　　　　　　 B. By going to a website.

C. From the notebook.　　　　　　　　 D. From the satellite.

3.Which of the following is NOT used in geocaching?

A. A GPS device.　　　　　　　　　　　 B. A compass.

C. A plastic container.　　　　　 　 D. The Internet.

4.Which of the following is true according to the passage?

A. Most geocachers are adults.

B. Any item can be placed in the caches.

C. The caches should be put in a remote place.

D. Geocachers try to avoid damaging the environment.

高三英语阅读理解困难题查看答案及解析

______some people are motivated by a need for success, others are motivated by a fear of failure.

A. Because 　　　　　　　 B. If

C. Unless 　　　　　　　　 D. While

高三英语单项填空简单题查看答案及解析

_________some people are motivated by a need for success, others are motivated by a fear of failure.

A. Because 　　　　　　　 　 　　 B. If

C. Unless 　　 　　　　　　　　　 D. While

高三英语单项填空中等难度题查看答案及解析

Is Fresh Air Really Good for You?

We all grew up hearing people tell us to “go out and get some fresh air.” 1. According to recent studies, the answer is a big YES, if the air quality in your camping area is good.

2. If the air you’re breathing is clean—which it would be if you’re away from the smog of cities—then the air is filled with life-giving, energizing oxygen. If you exercise out of doors, your body will learn to breathe more deeply, allowing even more oxygen to get to your muscles(肌肉) and your brain.

Recently, people have begun studying the connection between the natural world and healing(治愈). 3. In these places patients can go to be near nature during their recovery. It turns out that just looking at green, growing things can reduce stress, lower blood pressure, and put people into a better mood(情绪).Greenery is good for us. Hospital patients who see tree branches out their window are likely to recover at a faster rate than patients who see buildings or sky instead. 4. It gives us a great feeling of peace.

5.While the sun’s rays can age and harm our skin, they also give us beneficial Vitamin D　 . To make sure you get enough Vitamin D—but still protect your skin—put on sunscreen right as you head outside. It takes sunscreen about fifteen minutes to start working, and that’s plenty of time for your skin to absorb a day’s worth of Vitamin D　 .

A.Fresh air cleans our lungs.

B.So what are you waiting for?

C.Being in nature refreshes us.

D.Another side benefit of getting fresh air is sunlight.

E.But is fresh air really as good for you as your mother always said?

F.Just as importantly, we tend to associate air with health care.

G.All across the country, recovery centers have begun building Healing Gardens.

高三英语七选五中等难度题查看答案及解析

Young people should learn how to_____some money for the future.

A.hand out　 B.make up　　 C.put away 　　 D.get in

高三英语单项填空中等难度题查看答案及解析