(2015·重庆) Like ancient sailors, birds can fin...

(2015·重庆) Like ancient sailors, birds can find their way__________ the sun and the stars.

A. used B. having used

C. using D. use

高三英语单项填空中等难度题查看答案及解析

Like ancient sailors, birds can find their way____ the sun and the stars.

A. used 　　　　　　　　　　 B. having used

C. using　　 　　　　　　 　　 D. use

高三英语单项填空中等难度题查看答案及解析

Like ancient sailors, birds can find their way____ the sun and the stars.

A. used　 B. having used　　 C. using　　　　 D. use

高三英语单项填空中等难度题查看答案及解析

Some people are like homing pigeons: Drop them off anywhere, and they’ll find their way around. Other people, though, can’t tell when they’re holding a map upside down. Are the directionally challenged just bad learners?

Not all of your navigational (导航的)skills are learned. Research shows that your sense of direction is innate. An innate ability is something you are born with. Your brain has special navigational neurons—head-direction cells, place cells, and grid cells (网格细胞)—and they help program your inside compass when you’re just a baby.

In 2010, scientists carried out an experiment to study baby rats’ neural activity in their brains. Although the rats were newborns, the researchers discovered that their head-direction cells (which help them recognize the direction they’re facing) were fully grown and developed. The rats, it seemed, were born with a sense of direction. And they hadn’t even opened their eyes yet!

Humans, of course, are not rats. But the hippocampus—the brain area we use for navigation—is similar in most mammals. If the rat’s compass develops this way, then it’s likely that a human’s compass does, too.

If we’re born with a sense of direction, then why are some people so good at getting lost? The scientists found that the two other cells—place and grid cells—developed within the first month. Place cells are thought to help us form a map in our mind, while grid cells help us navigate new and unfamiliar places. The two cells work together, and that’s where the trouble might be.

People who took part in a 2013 study played a video game that required them to travel quickly between different places. Monitoring their brains, the scientists found that grid cells helped the gamers recognize where they were—even without landmarks. According to researcher Michael Kahana, differences in how grid cells work may help explain why some people have a better sense of direction than others.

1.What did the 2010 research find?

A. Rats have a natural ability to recognize directions.

B. Rats’ hippocampus is different from that of humans.

C. Rats usually find their way without opening their eyes.

D. Baby rats have as many head-direction cells as grown-ups.

2.What do we know about our navigational neurons?

A. Place cells let us know how to read a map.

B. Grid cells help us reach the place we are going to.

C. They help us use a compass when we lose our way.

D. Place and grid cells grow later than head-direction cells.

3.Why are some people so good at getting lost?

A. They can’t remember landmarks.

B. Their grid cells can’t work very well.

C. They are unfamiliar with new places.

D. Their ability to follow directions is poor.

4.What is the text mainly about?

A. Human navigational skills.

B. The compass in rats’ body.

C. Why grid cells are useful.

D. How homing pigeons work.

高三英语阅读理解中等难度题查看答案及解析

（2010·重庆模拟）By looking at a problem in as many ways as possible, creative thinkers can find solutions that would _______ remain invisible．

A．otherwise                       B．yet                   C．already                            D．forever

高三英语单项填空中等难度题查看答案及解析

阅读下列短文，根据短文内容填空。在未给提示词的空白处仅填写1个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。

How can horses find their way back from a strange environment? For most people, that would be impossible without a map. Horses have a special system in their brains, and it works just 1. GPS. It shows signs for trees and other objects in their home areas. It also takes notes of new things in new areas. 2. horses keep their attention on those signs, they know which directions 3. (go). Who needs a self-driving car when you can have a horse? You’ll always get home safe and sound.

高三英语语法填空简单题查看答案及解析

Dogs are known for their sense of smell．They can find missing people and things like bombs and illegal drugs．Now a study suggests that the animal known as man’s best friend can even find bladder（膀胱）cancer．

Cancer cells are thought to produce chemicals with unusual odors（气味）．Researchers think dogs have the ability to smell these odors, even in very small amounts, in urine（尿）．The sense of smell in dogs is thousands of times better than in humans．

The study follows reports of cases where, for example, a dog showed great interest in a growth on the leg of its owner．The man was later found to be skin cancer．Carolyn Willis led a team of researchers at Amersham Hospital in England．They trained different kinds of dogs for the experiment．The study involved urine collected from bladder cancer patients, from people with other diseases and from healthy people．Each dog was tested 8 times．In each test there were 7 samples for the dogs to smell．The dog should signal the one from a bladder cancer patient by lying down next to it．Two cocker dogs were correct 56 percent of the time．But the scientists reported an average success rate of 41 percent．The British Medical Journal published the research．In all, 36 bladder cancer patients and 108 other people took part．During training, all the dogs reportedly even identified（认出）a cancer in a person who had tested healthy before the study．Doctors found a growth on the person’s right kidney（肾）．Carolyn Willis says dogs could help scientists identify the combined chemicals produced by bladder cancer．That information could then be used to develop machines to test for the chemicals．The team also plans to use dogs to help identify markers for other kinds of cancer．

49．What’s the general idea of the text?

A．Dogs have a good sense of smell        B．Dogs can help cure cancer

C．Dogs can smell cancer                 D．Dogs help perform experiments

50．According to the text, people who suffer bladder cancer_____

A．often have urine with unusual smell                       B．probably smoke cigarettes in their life

C．can easily make dogs lie down

D．are likely to die within nine years

51．The underlined word “involved” in the text is closest in meaning to _____．

A．showed            B．used          C．proved       D．preferred

52．What can we conclude from the last paragraph?

A．Dogs can only smell bladder cancer．

B．Dogs have a good knowledge of cancer．

C．Cancer doesn’t have any sign in the beginning．

D．Scientists might invent some equipment to test cancer．

高三英语阅读理解中等难度题查看答案及解析

Many migrating birds wing their way over and through the city,_____some surprising natural scenery.

A.created B.creating C.having created D.to create

高三英语单项填空中等难度题查看答案及解析

Like their ancient toga-wearing counterparts, modern philosophers continue to disagree on the nature of freewill. Do we really have any control over the choices we make and the things we desire, and if so, to what degree?

Theories of freewill vary, but the ancient words of Plato still line up with our modern perceptions(概念) of temptation and willpower. The respected Greek philosopher argued that the human experience is one of constant struggle between the intellect and the body, between rationality and desire. Along these lines, true freedom is only achievable when willpower unchains us from bodily, emotional, instinctual slavery.

You can find similar thoughts throughout world religions, most of which offer a particular and often difficult path to rise above our darker natures.

And science? Well, science mostly agrees with all of this. Willpower is all about overcoming your natural desires to eat cupcakes, skip your morning workout, play games on mobile phone, hit the snooze alarm and check your e-mail during a funeral.

Your willpower, however, is limited. If life were a video game, you'd see a glowing "willpower" or "ego"(自我) meter at the top of the screen next to your "life" meter. Successfully resist one temptation, and the meter drains a little. The next temptation drains the "willpower" meter even more, until there's nothing left at all.

Our modern scientific understanding of willpower in large part stems from a 1996 research experiment involving chocolate and radishes(小红萝卜). Psychologist Roy Baumeister led a study in which 67 test subjects were presented with tempting chocolate chip cookies and other chocolate-flavored treats before a persistence-testing puzzle. Here's the catch: The researchers asked some of the participants to withdraw from sweets and snack on radishes instead.

Baumeister's results told a fascinating story. The test subjects who resisted the sweet stuff in favor of radishes performed poorly on the persistence test. They simply didn't have the willpower left to resist slacking off(松懈).

The research inspired more than a thousand additional studies discussing everything from the influence of positive messages to the ego-sapping power of daily decisions

Studies also show that cognitive capacity also affects our ability to hold out against temptation. Cognitive capacity is essentially your working memory, which you employ when resisting a temptation ... or holding a string of numbers in your head. A 1999 study from the University of Iowa professor Baba Shiv found that people tasked with remembering a two-digit number held out better than people remembering a seven-digit number when tempted with chocolate cake.

1.What do you understand by ‘freewill’?

A. The control we have over the choices.

B. The choices we make and the things we desire

C. The choices that philosophers force us to make

D. Our perception of temptation.

2.According to Plato, when is true freedom available?

A. When there is a struggle between the intellect and the body

B. When our willpower helps us to overcome our basic instincts

C. When we desire that which we cannot achieve

D. When we have no control over our ego

3.What is meant by ‘cognitive capacity’?

A. Willpower to realize one’s own ego. B. Our ability to overcome temptation

C. Our ability to remember things. D. The desire to give in to temptation

高三英语阅读理解中等难度题查看答案及解析

1.Which book mainly deals with money?

A.Modern Classical Physics.

B.How Global Currencies Work.

C.The Mexican Heartland.

D.Hasidism-A New History.

2.Which book is NOT likely to talk about history?

A.Modern Classical Physics.

B.The Mexican Heartland.

C.Hasidism-A New History.

D.In Search of the Phoenicians.

高三英语阅读理解简单题查看答案及解析