Bats quickly eat the insects that bite us and...

Bats quickly eat the insects that bite us and ruin our crops. They pollinate (授粉) flowers and they replant forests by spreading seeds around. But as agriculture overtakes rain forests and jungles, humans have come into conflict with one bat species: the common vampire bat (吸血蝙蝠).

Well, vampire bats are ugly little animals. They’ve got these wrinkly noses that have infrared (红外线的) heat sensors so they can detect warm blood flowing beneath the skin. They’ve got ears that can pick up the sound of low frequencies. That’s the sound of big animals breathing. And they have super sharp teeth. So when you’re bitten by one of these bats, you don’t even feel it. They also have amazing movement skills. They can fly, but they can also run with their wings,

And vampire bats mainly interact with humans who are raising livestock. They’ll drink the blood of cows and pigs and chickens. You can find newborn cows with bites from vampire bats, chicken coops that are covered in drips of blood. Children will regularly wake up with vampire bat bites on their feet. Actually, the bites aren’t that big of a health problem. The main problem is that very rarely these bats are sick with rabies (狂犬病). And they can spread this fatal disease to cattle and people.

Gerry, a scientist, does experiments where he keeps one of the bats away from food for a night. And that’s something that actually happens in the wild all the time. The bat will go out and it can’t find anything to eat. And if that happens two nights in a row, the bat could actually starve to death. But what happens is that another bat will come in and they’ll rescue that hungry bat. They’ll let out a little blood to feed it. And this behavior is seen between mothers and their children and between siblings. But surprisingly, it’s also seen between bats that aren’t related at all.

1.What does the second paragraph mainly want to tell us about vampire bats?

A.Their physical organs. B.Their super powers.

C.Their living habits. D.Their attacking skills.

2.What is the vampire bat’s biggest threat to human beings?

A.It drinks the blood of livestock. B.It prefers to bite little children.

C.It can spread a fatal disease. D.It is often infected with rabies.

3.What do Geny’s experiments find out?

A.Bats, not related by blood, share blood. B.Bats usually live a hard life in the wild.

C.Different bats live a quite different life. D.Blood is even more important for bats.

4.What can we can infer from the text?

A.Vampire bats are human’s natural enemy.

B.Human should try to get rid of vampire bats.

C.Vampire bats are human’s true friends.

D.Vampire bats should not always be blamed.

高三英语阅读理解中等难度题查看答案及解析

Birds are the only animals with feathers, although some other animals, such as insects and bats, also have wings．Nearly all birds can fly, and even flightless birds, such as ostriches （鸵鸟）, penguins, evolved from flying ancestors．

Birds are found worldwide in many habitats．They can fly over some of the highest mountains on earth as well as both of the earth’s poles, dive through water to depths of more than 250m, and occupy habitats with the most extreme climates on the planet, including arctic tundra （冻土地带） and the Sahara Desert．Certain kinds of seabirds are commonly seen over the open ocean thousands of kilometers from the nearest land, but all birds must come ashore to raise their young．

Highly developed animals, birds are sensitive and responsive, colorful and graceful, with habits that excite interest and inquiry．People have long been fascinated by birds, in part because birds are found in the same habitats in which humans live．And like people, most species of birds are active during daylight hours．Humans find inspiration in birds’ capacity for flight and in their musical calls．Humans also find birds useful---their flesh and eggs for food, their feathers for warmth, and their companionship．Perhaps a key basis for our friendliness with birds is the similarity of our sensory worlds: Both birds and humans rely more heavily on hearing and color vision than on smell．Birds are useful indicators of the quality of the environment, because the health of bird populations mirrors the health of our environment．The rapid decline in birds populations and the accelerating extinction rates of birds in the world’s forests, grassland, wetlands, and islands are therefore reasons for great concern．

1.Which of the following would be the best title of the text?

A．Animals with Feathers and Wings

Our friendliness with birds

C．An introduction to Birds

D．Bird’s life

2.What does the second paragraph mainly tell us ?

A．Bird’s friendship              Bird’s habitats

C．Bird’s raising                 D．Bird’s environment

3.Which of following is NOT true according to the passage ?

A．Bird’s flying abilities and musical calls inspire humans greatly．

Birds live in the same surroundings in which humans live．

C．Both birds and humans rely more heavily on hearing and smell than on color vision．

D．Bird’s flesh and eggs for food, bird’s feathers for warmth, and their companionship are useful to us．

4.From the text it may imply but NOT state that __________．

A．the environment is being damaged seriously

if you want to raise birds, you should pay attention to environment

C．the environment affects the human beings

D．bird populations decrease rapidly

高三英语阅读理解中等难度题查看答案及解析

At night, bats fly through the air, catching hundreds of insects and other small animals. But during the day, they hardly move at all. Instead, bats pass the time hanging upside down from a secret spot.

There are a couple of reasons why bats rest this way. First of all, it puts them in a position for takeoff. Unlike birds, bats can’t fly into the air from the ground. Their wings don’t produce enough lift to take off from a dead stop, and their hind legs are so small and underdeveloped that they can’t run to build up the necessary takeoff speed. Instead, they use their front claws to climb to a high spot, and then fall into flight.

During the hours when most enemies are active, bats gather where few animals would think to look and most can’t reach. This allows them to disappear from the world until night comes again. There’s also little competition for these resting spots, as other flying animals don’t have the ability to hang upside down. Bats have a unique physiological adaptation that lets them hang around this way without using any energy. For you to hold your fist around an object tight, you contract(紧缩) several muscles in your arm, which are connected to your fingers by tendons(腱)；as one muscle contracts, it pulls a tendon, which pulls one of your fingers closed. A bat’s talons(爪) close in the same way, except that their tendons are connected only to the upper body, not to a muscle. To hang upside down, a bat pulls its claws open with other muscles. To get the talons to take hold of the surface, the bat simply lets its body relax. The weight of the upper body pulls down on the tendons connected to the talons, causing them to hold tight. Therefore, the bat doesn’t have to do anything to hang upside down.

1.Bats hang upside down because________.

A. they haven’t developed a pair of strong claws

B. they can’t start to fly from the ground directly

C. they have no hind legs to support their body

D. they can’t find quiet places to stay during the day

2.The third paragraph tells us that bats’ hanging upside down_______.

A. is to save their energy for night movement

B. is a way to fight against flying animals

C. is a great way to hide from danger

D. is a skill to compete for the flying places

3.Why can bats hang upside down easily?

A. Because their upper body is light.

B. Because they have strong muscles.

C. Because their talons are linked to muscles tightly.

D. Because their tendons are linked to their upper body.

4.What is the passage mainly about?

A. The living habits of bats.

B. How and why bats hang upside down.

C. The importance of bats’ hanging upside down.

D. How bats use their energy at night.

高三英语阅读理解中等难度题查看答案及解析

When most of us look at our hands, we might notice that we need to clean, or stop biting our fingernails, and that’s about it. But if you ask a doctor, he can see a whole lot more. Everything from poor diet and stress to serious kidney (肾) problems can be revealed by a glance at your fingernails.

There are about 30 different nail signs that can be associated with medical issues, though may indicate more than one problem, according to Dr.Amy Derick, a clinical instructor of dermatology at Northwestern University.

Here are five of the things a doctor can tell about your health based on your fingernails.

1. People who aren’t eating well and lack vitamin or dietary may have thinner than normal nails, which are more likely to break.

2.Horizontal (水平的) lines are associated with serious physical stress. They frequently occur in people who have gone through chemotherapy(化疗).They can also occur after some illnesses, injuries, or with severe malnourishment(营养不良).Interestingly, there may be an altitude connection too. They’ve also been found in people who dove 1,000 feet and others who participated in an Everest exploration.

3. Vertical （垂直的）lines, however, are generally not such a big deal. Some people are more genetically prone to them than others, but they’re commonly associated with aging.

4. When people lack iron, their nails can turn spoon-like. Instead of curving down and covering the finger normally, they ’ll start to rise up on the sides and front, like the part of a spoon that holds liquid.

5. Kidney and liver problems can create “half-and-half nails”, where one part of the nail is white and the other part dark or pink, according to Derick.

Doctors note that because disease diagnosis is complex and some symptoms can be associated with different diseases, you should always see a medical professional if you are concerned about something you notice.

1. What is the main idea of the passage?

A. Doctors can tell us something about our health by looking at our nails.

B. We should see a doctor if we find nails in bad condition.

C. A famous doctor in the USA conducted an interesting research.

D. If we don’t want to get ill, we need to clean and stop biting our fingernails.

2. If we don’t eat well or regularly, our fingernails may ________.

A. become harder than normal nails.

B. become thinner than normal nails.

C. become “half-and-half” nails.

D. have horizontal and vertical lines.

3.Who will have horizontal lines on the nails ?

A. A cancer patient who has received normal treatment.

B. Hungry African children suffering from severe malnourishment.

C. An explorer who had reached Zhangjiajie in Hunan Province.

D. A patient with serious illness, like kidney and liver problems.

4. Which of the following best describes the nails that show people lack iron?

A. The nails are thinner and more likely to break.

B. The nails will curve down and cover the fingers.

C. The nails will start to rise up on the sides and front.

D. The nails will change their colours on the surface.

高三英语阅读理解困难题查看答案及解析

In our life, we will have a lot of time to feel low. If there’s one thing that ruins us, which 48 us from doing what we’re 49 capable of and prevents us from achieving our dreams, it is fear of 50.

Many of us go through our lives never knowing what we could have done and what has often been heard is that if only we hadn’t given up our 51.

What if you had given up on 52 to talk, walk, read, ride a bike, or any other achievements before you were even five years old? How 53 would your life have turned out if you’d given up instead of 54 with them?

Now, how different has your life been because of the goals you gave up? Because you were afraid that you would fail, how many experiences and opportunities have you 55 out on because you couldn’t get past that invisible barrier of fear!?

1.                A．increases       B．stops           C．inspires   D．helps

2.                A．truly           B．hardly          C．honestly  D．easily

3.                A．death          B．trouble         C．sorrow   D．failure

4.                A．plans          B．jobs            C．dreams   D．lives

5.                A．trying          B．learning        C．practicing D．studying

6.                A．strange         B．poor           C．successful     D．different

7.                A．playing         B．covering        C．sticking   D．moving

8.                A．missed         B．picked          C．taken D．looked

高三英语完型填空中等难度题查看答案及解析

Most of us, if we know even a little about where our food comes from, understand that every bite put into our mouths was ________ alive.

A.steadily B.instantly

C.formerly D.permanently

高三英语单项填空中等难度题查看答案及解析

Most of us, if we know even a little about where our food comes from, understand that every bite put into our mouths was 　　　　 alive.

A. steadily　　　　　 B. instantly

C. formerly　　　　　　 D. permanently

高三英语单项填空中等难度题查看答案及解析

— The movie starts at 8:30, and we can have a quick bite before we go.

— 　　　 . See you at 8:10.

A. So long　　 B. Sounds great　　 C. Up to you　　 D. Have a good time

高三英语单项填空中等难度题查看答案及解析

—The movie starta at 8:30,and we can have a quick bite before wo go

--.See you at 8:10

A. So long 　　　　　　　　 B.　 Sounds great　

C. Good luck 　　　　　　 D.　 Have a good time　　

高三英语单项填空简单题查看答案及解析

—The movie starts at 8:30,and we can have a quick bite before we go.

—_________.See you at 8:10.

A. So long　　 　　　　　 B. Sounds great　 　

C. Good luck　 　　　　 D.Have a good time

高三英语其他题中等难度题查看答案及解析