Think hard and you won’t have the puzzle you....

Think hard and you won’t have the puzzle          you.

高三英语单项填空困难题查看答案及解析

Scientists think they have the answer to a puzzle that confused even Charles Darwin： How flowers evolved and spread to become the most important plants on earth．

Flowering plants, or angiosperms (被子植物), make up about 90% of all living plant species,but how they did this has been a mystery. New research suggests it is due to genome (基因组) size．

Hundreds of millions of years ago,the earth was dominated by ferns (蕨类)and conifers(针叶树) - they were the main plants on the earth． Then, about 150 million years ago， the first flowering plants appeared on earth. They quickly spread to all parts of the world．

Why angiosperms were successful and diverse on earth has been debated for centuries.Charles Darwin himself called it a "mystery", fearing this apparent sudden change might challenge his theory of evolution．

Kevin Simonin from San Francisco State University in California US and other researchers analyzed data held by the Royal Botanic Gardens, Kew， on the genome size of hundreds of plants, including flowering plants, gymnosperms (a group of plants including conifers) and ferns. They then compared genome size with anatomical (结构上的) features. This provides "strong evidence" that the success and rapid spread of flowering plants around the world is due to "genome downsizing"．

By reducing the size of the genome, which is contained within the nucleus (核) of the cell, plants can build smaller cells. The researchers say genome-downsizing happened only in the angiosperms, and this was "a necessary condition for rapid growth rates among land plants"．

1.What do we know about angiosperms？ ______

A.They are superior in number among all living plant species．

B.They controlled the earth for hundreds of millions of years．

C.They challenge Charles Darwin's theory．

D.They are extinct plants in the world．

2.It can be implied that ______ ．

A.Simonin works in the Royal Botanic Gardens Kew

B.Simonin is probably an American biologist

C.Darwin was confident of his theory of evolution

D.Darwin succeeded in figuring out the flower evolution

3.What contributed to the success and diversity of angiosperms？ ______

A.The weaker ferns and conifer．

B.The larger nucleus．

C.The stronger cell．

D.The smaller genome．

4.What can be a suitable title of this passage？ ______

A.Why were gymnosperms successful on earth？

B.What puzzle confused even Charles Darwin？

C.Why angiosperms dominated the earth？

D.When angiosperms outnumbered conifers and Ferns？

高三英语阅读理解中等难度题查看答案及解析

You must have been troubled by when to say “I love you” because it is one of the greatest puzzles in our life.

What if you say it first and your partner doesn’t love you back? Or if they do say it but you don’t feel they mean it? Being the first to declare your love can be nerve racking(紧张）and risky and can leave you feeling as vulnerable as a turtle with no shell. But is the person who says it first really in a position of weakness? Doesn’t it pay to hold back, play it cool and wait until the other half has shown their hand fast?

A really good relationship should be about “being fair and being equal,” says psychologist Sidney Crown. “But love is seldom equal.” All relationships go through power struggles but, he says, if a love imbalance continues for years, the rot will set in. “That feeling of ‘I’ve always loved you more’ may be subverted(颠覆，破坏) for a time, but it never goes away completely and it often emerges in squabbling(大声争吵).”  In love, at least, the silent, withholding type is not always the most powerful. “The strongest one in a relationship is often the person who feels confident enough to talk about their feelings,” says educational psychologist Ingrid Collins. Psychosexual therapist Paula Hall agrees. “The one with the upper hand is often the person who takes the initiative. In fact, the person who says ‘I love you’ first may also be the one who says ‘I’ m bored with you’ first.” Hall believes that much depends on how “I love you” is said and the motivation of the person saying it. “Is it said when they’re drunk? Is it said before their partner files off on holiday, and what it really means is ‘Please don’ t be unfaithful to me’ ?” By saying ‘I love you’, they are really saying ‘Do you love me?’ If so, wouldn’t it just be more honest to say that. Collins agrees that intention is everything. “It’s not what is said, but how it’s said. What it comes down to is the sincerity of the speaker.”

1. What is the main idea of this passage?

A. The importance of “I love you”　

B. The meaning of “I love you”　

C. The time of saying “I love you”　

D. The place of saying “I love you”　

2. In the first sentence the author means that _________.

A. it is easy to say “I love you”　　

B. it is hard to say “I love you”　

C. we have many troubles in our life

D. people usually do not know when to say “I love you”　

3. According to the expert, a good relationship should be _______.

A. fair and equal　　      B. fair and kind

C. powerful and equal　　 D. confident and fair

4. In the third paragraph, the phrase “with the upper hand” means _________.

A. being low in spirit　　 B. having only one hand

C. being active 　　     D. being passive

高三英语阅读理解简单题查看答案及解析

Can you tell the _____ difference between the words “require” and “request”? I sometimes get puzzled by their meanings.

A.apparent B.subtle C.dramatic D.regional

高三英语单项填空中等难度题查看答案及解析

Can you tell the _____ difference between the words “require” and “ request”? I sometimes get puzzled by their meanings.

A. dramatic             B. regional         C. apparent             D. subtle

高三英语简单题查看答案及解析

— You look puzzled at the news.

— Yes. I just can’t imagine _____ he could have done such a thing.

A. what                        B. how                         C. whether                           D. Where

高三英语单项填空中等难度题查看答案及解析

22. The computer programs are a puzzle to me. The more I think of them, the more questions I think of________.

高三英语单项填空简单题查看答案及解析

Sudoku (数独) puzzles give your brain a hard time: Every number from 1 to 9 must appear in each of the nine horizontal (横向的) rows, in each of the nine vertical columns and in each of the nine boxes.

For many of us, this can be a reason for a headache, but in the very rare case of a German man, a Sudoku puzzle even caused seizures (痉挛).

In a new case study from the University of Munich, published in the Journal of the American Medical Association, Dr. Berend Feddersen introduces a student who was 25 years old when he was buried by a snow slide during a ski tour. For 15 minutes, he didn’t get enough oxygen, which severely damaged certain parts of his brain. “He had to receive treatment on the scene. Luckily he survived,” says Feddersen, the author of the study.

Weeks after the accident, when the young man was ready for recovery treatment, something bizarre happened: When the patient solved Sudoku puzzles, he suddenly had seizures of his left arm — something the medical world hadn’t seen before.

Feddersen explains: “In order to solve a Sudoku, the patient used parts of his brain which are responsible for vision-space tasks. But exactly those brain parts had been damaged in the accident and then caused the seizures once they were used.”

This particular case is an example of what doctors call reflex epilepsy (反射性癫痫), according to Dr. Jacqueline French, professor from NYU Langone School of Medicine.

“You have to have an injury of your brain first, and then seizures like that can happen,” she says.

In the meantime, the patient from the case study stopped solving Sudoku puzzles forever and has been seizure-free for more than five years. “Fortunately, he can do crossword puzzles. He never had problems with those,” Feddersen says.

1.In the accident, the student ______.

A. began to experience seizures in his left arm

B. got the vision-space part of his brain damaged

C. had to be sent to hospital as soon as possible

D. found his Sudoku ability seriously weakened

2.It can be learned from the text that ______.

A. the man cannot complete crossword puzzles now

B. it is Sudoku playing that brings about his seizures

C. the man’s symptoms are common and widely observed

D. the seizures cause much trouble to the man’s daily life

3.This text can be best described as______.

A. a medical test B. a warning to skiers

C. a news report D. a research paper

高三英语阅读理解困难题查看答案及解析

The twin brothers stand under the tree, ______ and say nothing.

A．puzzled      B．puzzling     C．being puzzling   D．being puzzled

高三英语单项填空简单题查看答案及解析

Time and how we experience it have always puzzled us．Physicists have created fascinating theories, but their time is measured by a pendulum （钟摆） and is not psychological time, which leaps with little regard to the clock or calendar．As some-one who understood the distinction observed, "When you sit with a nice girl for two hours it seems like a minute, but when you sit on a hot stove, a minute seems like two hours．"

Psychologists have long noticed that larger units of time, such as months and years, fly on swifter wings as we age．They also note that the more time is structured with schedules and appointments, the more rapidly it seems to pass．For example, a day at the office flies compared with a day at the beach．Since most of us spend fewer days at the beach and more at the office as we age, an increase in structured tune could well be to blame for why time seems to speed up as we grow older．

Expectation and familiarity also make time seem to flow more rapidly．Almost all of us have had the experience of driving somewhere we’ve never been before. Surrounded by unfamiliar scenery, with no real idea of when we’ll arrive, we experience the trip as lasting a long time. But the return trip, although exactly as long, seems to take far less time. The novelty of the outward journey has become routine. Thus taking a different route on occasions can often help slow the clock.

When was become as identical as identical as beads（小珠子）on a string, they mix together, and even months become a single day. To counter this, try to find ways to interrupt the structure of your day—to stop time, so to speak.

Learning something new is one of the ways to slow the passage of time. One of the reasons the days of our youth seems so full and long is that these are the days of learning and discovery. For many of us, learning ends when we leave school, but this doesn’t have to be.

1.The underlined sentence in Paragraph 1 is used to show________.

A．psychological time is quite puzzling

B．time should not be measured by a pendulum

C．physical time is different from psychological time

D．physical theory has nothing to do with the true sense of time

2.Why do units of time fly faster as we grow older?

A．Our sense of time changes.

B．We spend less time at the beach.

C．More time is structured and scheduled.

D．Time is structured with too many appointments.

3.In Paragraph 3 “novelty” probably means________.

A．excitement B．unfamiliarity

C．imagination D．amusement

4.The purpose of the passage is to________.

A．give various explanations about time

B．describe how we experience time psychologically

C．show the different ideas of physicists and psychologists on time

D．explain why time flies and how to slow it down psychologically

高三英语阅读理解中等难度题查看答案及解析