Elephants born without tusks(长牙) normally make up just 2 to 6 percent of the herd population. However, that is not the case at Mozambique’s Gorongosa National Park, where 33 percent of female elephants born after the country’s civil war ended in 1992 are tuskless. While that might be just a coincidence(巧合), Joyce Poole, an elephant behavior expert, has another theory.
The researcher thinks we may be witnessing an unnaturally evolution of the species due to the hunting of the elephants for their valuable tusks. Unlike our permanent teeth, tusks of elephants grow throughout the animal’s life, becoming longer and thicker with age. For decorative purposes, poachers usually first target older males due to their impressive tusks, and females are not spared either. As a result, in areas where hunting goes unchecked for long, the number of tuskless females increases. This allows them to gain a biological advantage, resulting in a larger than average population of female offspring (后代)with no tusks.
Poole believes this phenomenon explains the rise in the number of tuskless females at Gorongosa National Park. The researcher says before the war, the park was home to over 4,000 elephants. However, by the time the conflict ended in 1992, about 90 percent of the elephants had been slaughtered for tusks to help finance weapons and meat to feed the soldiers. Of the less than 200 survivors, over 50 percent of the females had no tusks. Hence, it is not surprising that the park’s tuskless elephant population has grown greatly.
So far, the hunting has largely influenced female elephants. Poole explains, “Very few males are tuskless because males require tusks for fighting. Without tusks, males have a much harder time breeding and do not pass on their genes(基因) as often as tusked ones.” If the hunting of males for tusks continues at this pace, it could result in a generation of elephants with much smaller tusks.
1.How does the writer draw readers’ attention to the topic?
A.By comparing figures. B.By offering explanation. C.By giving an example. D.By introducing an expert.
2.What might be the reason for the increase of tuskless females?
A.Illegal hunting. B.Pure coincidence.
C.Natural evolution. D.Effective protection.
3.What does the underlined word “slaughtered” in Paragraph 3 mean?
A.Raised. B.Protected. C.Killed. D.Trained.
4.What is the text mainly about?
A.The future of African elephants.
B.The protection of African elephants.
C.The increasing number of tuskless elephants.
D.The genetic consequence of hunting elephants.
5.In which section of a newspaper may this text appear?
A.Health. B.Science. C.Education. D.Finance.
高二英语阅读理解中等难度题
Elephants born without tusks(长牙) normally make up just 2 to 6 percent of the herd population. However, that is not the case at Mozambique’s Gorongosa National Park, where 33 percent of female elephants born after the country’s civil war ended in 1992 are tuskless. While that might be just a coincidence(巧合), Joyce Poole, an elephant behavior expert, has another theory.
The researcher thinks we may be witnessing an unnaturally evolution of the species due to the hunting of the elephants for their valuable tusks. Unlike our permanent teeth, tusks of elephants grow throughout the animal’s life, becoming longer and thicker with age. For decorative purposes, poachers usually first target older males due to their impressive tusks, and females are not spared either. As a result, in areas where hunting goes unchecked for long, the number of tuskless females increases. This allows them to gain a biological advantage, resulting in a larger than average population of female offspring (后代)with no tusks.
Poole believes this phenomenon explains the rise in the number of tuskless females at Gorongosa National Park. The researcher says before the war, the park was home to over 4,000 elephants. However, by the time the conflict ended in 1992, about 90 percent of the elephants had been slaughtered for tusks to help finance weapons and meat to feed the soldiers. Of the less than 200 survivors, over 50 percent of the females had no tusks. Hence, it is not surprising that the park’s tuskless elephant population has grown greatly.
So far, the hunting has largely influenced female elephants. Poole explains, “Very few males are tuskless because males require tusks for fighting. Without tusks, males have a much harder time breeding and do not pass on their genes(基因) as often as tusked ones.” If the hunting of males for tusks continues at this pace, it could result in a generation of elephants with much smaller tusks.
1.How does the writer draw readers’ attention to the topic?
A.By comparing figures. B.By offering explanation. C.By giving an example. D.By introducing an expert.
2.What might be the reason for the increase of tuskless females?
A.Illegal hunting. B.Pure coincidence.
C.Natural evolution. D.Effective protection.
3.What does the underlined word “slaughtered” in Paragraph 3 mean?
A.Raised. B.Protected. C.Killed. D.Trained.
4.What is the text mainly about?
A.The future of African elephants.
B.The protection of African elephants.
C.The increasing number of tuskless elephants.
D.The genetic consequence of hunting elephants.
5.In which section of a newspaper may this text appear?
A.Health. B.Science. C.Education. D.Finance.
高二英语阅读理解中等难度题查看答案及解析
While elephants born without tusks (长牙)are not unheard of，they normally form just 2 to 6 percent of the population. However, that is not the case at Mozambique’s Gorongosa National Park, where an astonishing 33 percent of female elephants born after the country’s civil war ended in 1992 are tuskless. While that may appear to be just a coincidence, Joyce Poole, an elephant behavior expert, has another theory. The researcher thinks we may be witnessing unnatural evolution of the species due to the constant hunting of elephants for valuable ivory.
Poole says before the country’s 15-year-long civil war, the 100,000-acre park was home to over 4,000 elephants. However, by the time the conflict ended in 1992, about 90 percent of them had been killed for ivory to help finance weapons (武器)and meat to feed the soldiers. Of the less than 200 survivors, over 50 percent of adult females had no tusks. Therefore, it is not surprising that the park’s tuskless elephant population has grown greatly.
This is not the first time researchers have observed a great change in the population of elephants. At Zambia’s South Luangwa National Park and Lupande Game Management Area， areas which were heavily hunted in the 1970s and 1980s, 35% of elephants 25 years or older and 13% of those younger than 25 are now without tusks. A 2008 study published found that the number of tuskless females at the Ruaha National Park in Tanzania went from 10.5 percent in 1969 to almost 40 percent in 1989, largely due to illegal hunting for ivory.
The recent ban on ivory in both the US and China should help get rid of, or at least reduce, elephant hunting. However, scientists are not sure how long it will take for elephants with a higher rate of tuskless females, to change the trend.
1.What is the probable cause of the phenomenon mentioned in Paragraph 1 ?
A. Illegal hunting. B. Constant farming.
C. A pure coincidence. D. Natural evolution.
2.Why did people kill so many elephants during the civil war in Mozambique?
A. To get funds by selling ivory.
B. To develop new weapons.
C. To provide food for local people.
D. To make ivory products.
3.Which of the following had the earliest record on tuskless elephants?
A. Gorongonsa National Park.
B. South Luangwa National Park.
C. The Ruaha National Park.
D. Lupande Game Management Area.
4.What does the underlined phrase “the trend” in the last paragraph refer to?
A. Elephants facing greater danger.
B. Elephants growing more slowly.
C. Fewer female elephants staying alive.
D. More female elephants being tuskless.
高二英语阅读理解中等难度题查看答案及解析
To me, this all just seems to _______ and I think it’s reasonable.
A. make sense B. lift up C. take in D. slow down
高二英语单项填空中等难度题查看答案及解析
Everyone is born with the ability to learn. There are normally two types of learning in our daily life and study — active learning and passive (被动的) learning. 1. This will help you develop a habit of active learning gradually.
2. I bet that no one sits down to read with the purpose of not getting the contents. But I’m sure that some of you have been in a situation, probably more than once, where you read an assignment, closed the book and thought “what the word was about”. 3. Active readers, on the other hand, set goals and check their understanding as they read. When they finish, they can explain the main points and know that they’ve seen what they have read.
Active learners think about information deeply and critically. Being thoughtful is an important part of active learning, because it means that you are analyzing and absorbing the information. 4. For instance, you may make connections between the new information and what you already know, identify concepts that you may not understand very well, or evaluate the importance of what you are reading. An active learner considers constantly in this way. In contrast, passive learners may read the text and listen to lectures and even understand most of what is read and heard. 5.
All in all, behavior of an active learner and a passive one varies greatly. Equipping yourself with study strategies (策略) of active learners may eventually help you become one of them
A.Passive learners won’t be strict with themselves.
B.You need to know some differences between them.
C.In other words, you are processing what you read.
D.However, that important step of reflecting on it is not taken.
E.Active learners accept much of the responsibility for learning.
F.When interacting with the text in this way, you are doing passively.
G.Active learners study with the purpose of grasping and memorizing information.
高二英语七选五中等难度题查看答案及解析
Don’t believe him .He is just _____ an excuse .
A. making out B. making up of C. making up D. making from
高二英语单项填空简单题查看答案及解析
阅读下面短文，根据其内容写一篇60词左右的内容概要。
Without water, your body would stop working properly. Water makes up more than half of your body weight, and a person can’t survive for more than a few days without it. Why? Your body has lots of important jobs and it needs water to do many of them. For instance, your blood, which contains a lot of water, carries oxygen to all the cells of your body. Without oxygen, those tiny cells would die and your body would stop working.
Most people think they can get water only from drinking water. However, they can get enough liquid through the drinks they consume every day. These include water, fruit juice, coffee, soda, iced tea, and other drinks. Your body doesn’t get water only from drinking water. Any liquid you drink contains water. Lots of foods contain water, too. Fruit contains quite a bit of water, which you could probably tell if you’ve ever eaten a peach or a plum and felt the juice dripping down your chin! Vegetables, also, contain a lot of water.
How much water should people drink? Many people believe they are supposed to drink eight glasses of water a day, or about two liters. Why? Because that is what they have been told all their life. But a new report offers some different advice. Experts say people should obey their bodies; they should drink as much water as they feel like drinking. The report says most people meet their daily needs for liquid by letting thirst be their guide.
You lose water when you breathe, sweat and so on. So you need to supplement (补充) enough liquid to stay healthy. If you don’t get enough water, you could become dehydrated (脱水). If you get very dehydrated, your body will no longer have enough liquid to circulate. This is very dangerous. Dehydration also can keep you from being as fast and sharp as you’d like to be. Serious dehydration can even make you sick.
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高二英语概要写作困难题查看答案及解析
I was born without legs, so I have to wear ones to walk or use a wheelchair. I was fine. I fought off every physical challenge in my life. I went to work, drove and lived on my own. I climbed stairs and buses by myself. However, one year ago, someone came into my life and showed me that there were more to face. His name is Joseph and he is my . He doesn’t that I was born without legs. Instead, he does want me to feed him, carry him and comfort him.
Anyone who has had a baby may know how much equipment it needs to take care of the baby. It turns out that being a parent without needs more equipment, At least, I need to equip my wheelchair a basket. When I put my baby in the basket, I can push him from room to room. It is a highly effective and cheap way and Joseph finds it fun.
, I try taking Joseph outside by using a baby belt and strapping(捆) him on my chest, but Joseph often blocks my , which makes it very difficult to go on. I manage to do it, it is more by than judgment. When a baby , often the most effective way is to comfort it by walking around with it. However, I can’t do that , because it takes too long for me to get to Joseph in my wheelchair. Sometimes, when I only stand upright on my hands, Joseph holds out his arms for a . He doesn’t understand that if there’s nothing for me to myself, I can’t safely hold him. His trust that I can look after him gives me more courage.
I have just his first birthday. I’m very for him to grow up and start walking, so that we can go outside together more easily. Let the challenges keep . We’ll be and fine.
1.A. beneficial B. artificial C. social D. official
2.A. put on B. called on C. turned on D. got on
3.A. challenges B. performances C. disabilities D. accidents
4.A. pet B. friend C. son D. husband
5.A. think B. know C. mind D. speak
6.A. legs B. arms C. hands D. fingers
7.A. about B. with C. on D. to
8.A. Occasionally B. Generally C. Jokingly D.Treasonably
9.A. sun B. nose C. idea D. view
10.A. Because B. Unless C. Although D. Otherwise
11.A. luck B. time C. money D. space
12.A. smiles B. sleeps C. signs D. cries
13.A. quickly B. endlessly C. sincerely D. selflessly
14.A. snack B. kiss C. movie D. hug
15.A. amuse B. balance C. introduce D. behave
16.A. seldom B. never C. Sometimes D. always
17.A. celebrated B. congratulated C. remembered D. communicated
18.A. bad B. eager C. famous D. late
19.A. dancing B. walking C. building D. coming
20.A. careful B. optimistic C. humorous D. helpful
高二英语完形填空中等难度题查看答案及解析
The course normally attracts 60 students per year, ______up to half are from Europe.
A.in which B.for whom C.with which D.of whom
高二英语单项填空中等难度题查看答案及解析
It’s normal to wake briefly during the night. 1.. But if you’re waking up during the night and having trouble falling back asleep, the following tips may help.
The key to getting back to sleep is continuing to prepare your body for sleep, so remain in bed in a relaxed position. Hard as it may be, try not to stress over the fact that you’re awake. 2..So just focus on the feelings and sensations in your body.
If you are finding it hard to fall back asleep, try a relaxation technique such as visualization, deep breathing, or meditation (沉思). 3.. Remind yourself that although they’re not a replacement for sleep, rest and relaxation still help refresh your body. Do a quiet, non-stimulating activity.
If you’ve been awake for more than 15 minutes, try getting out of bed and doing a quiet, non-stimulating activity, such as reading a book. Keep the lights dim so as not to think that it’s time to wake up. 4.. The type of light they send out is stimulating(刺激)the brain. A light snack might help relax you, but be careful not to eat so much that your body begins to expect a meal at that time of the day.
If you wake during the night feeling anxious about something, make a brief note of it on paper. 5.. You may find that it will be easier to solve it when you are fresh. Similarly, if a great idea is keeping you awake, make a note of it on paper and fall back to sleep, knowing you’ll be much more productive and creative aft-er a good night’s rest.
A. Arrange for it to take place the next day.
B. In fact, a good sleeper won’t even remember it.
C. The darker the bedroom is, the better you’ll sleep.
D. They can be done without even getting out of bed.
E. Try to make dinner time earlier in the evening.
F. Stress and anxiety encourage your body to stay awake.
G. Also avoid screens of any kind —computers, TVs, cell phones, iPads.
高二英语七选五中等难度题查看答案及解析
1.Xiaowen was born without the _______ to use her legs and has no _______ below the waist.
2.Today there are many o _________ for disabled people to develop their _________ , live a rich life and make a __________ to society.
3.__________ is not about getting high test scores, having a high IQ or being smart. _________, it seems that creative thinking, ___________ is one of the most ________ skills in society, is a _________ of habits.
高二英语课文填空困难题查看答案及解析