Gardeners may be able to cut down on the amou...

Gardeners may be able to cut down on the amount of weeds(杂草）killer they use by dealing with invaders at specific times of the day, such as dawn, a new study suggests.

Researchers at the University of Bristol have discovered that the 24-hour rhythms of plants leave them more defenseless to herbicides(除草剂) at different points in their daily 24 hour cycle.

They believe the findings could help farmers by reducing crop loss and improving harvests. And gardeners could benefit from knowing which weeds respond better at certain times of the day. In recent years, pesticides and herbicides have been implicated in the decline of important pollinating insects, such as bees.

Dr Antony Dodd，senior author of the new study，said: “The research suggests that, in future, we might be able to improve the use of some chemicals that are used in agriculture by taking advantage of the biological clock in plants.

Just like humans, plants have evolved to take advantage of cycles of night and day, with certain biological processes turning on at different times of the day.

Scientists have discovered that many drugs work much better in humans if they are given at specific hours. Aspirin, for example, has doubled the impact on thinning the blood if taken at night as opposed to in the morning. The process is known as ‘chronotherapy’ and researchers wanted to find out if the same concept could be applied to plants.

Many gardeners already know that plants drink in more water in the morning because their pores(气孔) are open to take advantage of early morning dew and water vapour. At the break of the day, plants are also not busy producing food throughphotosynthesis(光和作用）.The open pores could also be the reasons that chemicals are more effective at dawn and also at dusk.

The air is also likely to be stiller at dawn and dusk, meaning that pesticides or herbicides are less likely to be blown away to places where they are not wanted. Pesticide labels often warn against spraying on windy days in case they endanger people or animals. Many insects are active early in the morning and around dusk, also making very early morning and early evening effective times for insecticide.

Commenting on the study, Dr. Trevor Dines, Botanical Specialist at the conservation charity Plantlife, said: “This is fascinating research which will be of great interest to many gardeners like me. If anything used to think the opposite was true - that applying herbicides and pesticides late in the day would be better as they’d remain in Vet contact' with the plant for longer in the cool of the night and therefore be taken up or absorbed more effectively. This research knocks that assumption on its head”

1.Which of the following can replace the underlined phrase “implicated in” in the third paragraph?

A.restored to B.blamed for

C.limited to D.composed of

2.According to the research, what are the reasons for using herbicides in the morning?

A.The process of photosynthesis is most active in the morning.

B.Insects are more defenseless in the morning than any other time of the day.

C.Bigger pores on the plants make herbicides work more effectively.

D.The stronger morning wind blows pesticides away to more places.

3.What can be inferred from the last paragraph?

A.Gardeners were interested in combining science with gardening.

B.A long time had passed before herbicide was applied in farming.

C.The old assumption about the use of chemicals proved right.

D.Many gardeners used to spray herbicides at the wrong time.

4.What is the main idea of this article?

A.New chemicals have been found to help kill harmful insects.

B.Biological clock of plants could help gardeners use less weed killer.

C.Plants’ cycles can be taken advantage of to improve the environment.

D.The research on the effects of pesticides has enabled good harvests.

高三英语阅读理解困难题查看答案及解析

Gardeners may be able to cut down on the amount of weeds killer they use by dealing with invaders （入侵物） at specific times of the day， such as dawn， a new study suggests．

Researchers at the University of Bristol have discovered that the 24﹣hour rhythms of plants leave them more defenseless to herbicides （除草剂） at different points in their daily 24 hour cycle．

They believe the findings could help farmers by reducing crop loss and improving harvests． And gardeners could benefit from knowing which weeds respond better at certain times of the day． In recent years， pesticides and herbicides have been implicated in the decline of important pollinating insects， such as bees．

Dr． Antony Dodd， senior author of the new study， said， "The research suggests that， in future， we might be able to improve the use of some chemicals that are used in agriculture by taking advantage of the biological clock in plants．

Just like humans， plants have evolved to take advantage of cycles of night and day， with certain biological processes turning on at different times of the day． Scientists have discovered that many drugs work much better in humans if they are given at specific hours． Aspirin， for example， has doubled the impact on thinning the blood if taken at night as opposed to in the morning． The process is known as 'chronotherapy （时间疗法）' and researchers wanted to find out if the same concept could be applied to plants．

Many gardeners already know that plants drink in more water in the morning because their pores （气孔） are open to take advantage of early morning dew and water vapour． At the break of he day， plants are also not busy producing food through photosynthesis （光和作用）． The open pores could also be the reasons that chemicals are more effective at dawn and also at dusk．

The air is also likely to be stiller at dawn and dusk， meaning that pesticides or herbicides are less likely to be blown away to places where they are not wanted． Pesticide labels often warn against spraying on windy days in case they endanger people or animals． Many insects are active early in the morning and around dusk， also making very early morning and early evening effective times for insecticide．

Commenting on the study， Dr． Trevor Dines， Botanical Specialist at the conservation charity Plantlife， said， "This is fascinating research which will be of great interest to many gardeners like me． If anything they used to think the opposite was true ﹣that applying herbicides and pesticides late in the day would be better as they'd remain in wet contact with the plant for longer in the cool of the night and therefore be taken up or absorbed more effectively． This research knocks that assumption on its head．"

1.Which of the following can replace the underlined phrase "implicated in" in the third paragraph？

A.restored to

B.blamed for

C.limited to

D.composed of

2.According to the research， what are the reasons for using herbicides in the morning？

A.The process of photosynthesis is most active in the morning．

B.Insects are more defenseless in the morning than any other time of the day．

C.Bigger pores on the plants make herbicides work more effectively．

D.The stronger morning wind blows pesticides away to more places．

3.What is the main idea of this article？

A.New chemicals have been found to help kill harmful insects．

B.Biological clock of plants could help gardeners use less weed killer．

C.Plants' cycles can be taken advantage of to improve the environment．

D.The research on the effects of pesticides has enabled good harvests．

高三英语阅读选择中等难度题查看答案及解析

It’s time to reevaluate how women handle conflict at work. Being overworked or over-committed at home and on the job will not get you where you want to be in life. It will only slow you down and hinder(阻碍) your career goals.

Did you know women are more likely than men to feel exhausted? Nearly twice as many women than men ages 18-44 reported feeling drained of energy, according to a recent study.

This may not be surprising given that this is the age range when women have children. It’s also the age range when many women are trying to balance careers and home. One reason women may feel exhausted is that they have a hard time saying “no.” Women want to be able to do it all—volunteer for school parties or cook delicious meals—and so their answer to any request is often “Yes, I can.”

Women struggle to say “no” in the workplace for similar reasons, including the desire to be liked by their colleagues. Unfortunately, this inability to say “no” may be hurting women’s health as well as their career.

At the workplace, men use conflict as a way to position themselves, while women often avoid conflict or strive to be the peacemaker, because they don’t want to be viewed as aggressive at work. For example, there’s a problem that needs to be addressed immediately, resulting in a dispute over who should be the one to fix it. Men are more likely to face that dispute from the perspective of what benefits them most, whereas women may approach the same dispute from the perspective of what’s the easiest and quickest way to resolve the problem—even if that means doing the boring work themselves.

This difference in handling conflict could be the deciding factor on who gets promoted to a leadership position and who does not. Leaders have to be able to assign tasks and manage resources wisely. Shouldering more of the workload may not earn you that promotion. Instead, it may highlight you inability to effectively make use of what you have.

1.What does the author say is the problem with women?

A.They are often unclear about the career goals to reach.

B.They are usually more committed at home than on the job.

C.They tend to be over-optimistic about how far they could go.

D.They tend to push themselves beyond the limits of their ability.

2.The underlined word s “drained of energy” can be replaced by________

A.weak B.unhappy C.stressful D.tired

3.What do we learn about the difference of men and women on the job?

A.That women usually avoid conflict and strive to be the peacemaker is because their men colleagues are more aggressive.

B.When there is an urgent problem to address, women are more likely to do the task as they usually respond quicker than man.

C.Men and women differ in their approach to resolving workplace conflicts in that women are more ready to compromise.

D.Men have more chances to be leaders because they are able take advantage of others and shoulder less workload.

4.Which of the following event will the author have most interest to take part in?

A.A training course teaching women to say “no”.

B.A campaign for more women rights.

C.A debate on whether woman is capable of working on the job.

D.A sharing on how woman can balance work and family.

高三英语阅读选择困难题查看答案及解析

With a good shopping position and the right amount of money, any educated person ought to be able to make a living out of a bookshop. It is not a difficult trade to learn and the large chain-stores can never force the small bookseller out of existence as they have done to the corner shop. But the hours of work are very long---I was only doing a part-time job, but my boss put in a seventy---hour week, besides regular journeys out of shopping hours to buy books.

The real reason why I should not like to be back in the book trade for life, however, is that while I was in it I lost my love of books. A bookseller cannot always tell the truth about his books, and that gives him a dislike for them. There was a time when I really did love books---loved the sight and smell and feel of them---if they were fifty or more years old, that is. Nothing pleased me quite so much as to buy a bargain lot of them on sale for several pounds. There is a peculiar flavour（独特的味道）about the unexpected books you pick up in that kind of collection: little-known eighteenth-century poets, or out-of-date geography books. For occasional reading---in your bath, for example, or late at night when you are too tired to go to bed---there is nothing as good as a very old picture story-book.

But as soon as I went to work in the bookshop I stopped buying books. Seen in a mass, five or ten thousand at a time, books were dull and even a little tiresome. Nowadays I do buy one occasionally, but only if it is a book that I want to read and can’t be borrowed easily, and I never buy rubbish.

1.List two conditions that are necessary to run a bookshop. (No more than 9 words)

____________________________________________________________________________

2.Why didn’t the author want to go back to the book trade? (No more than 10 words)

____________________________________________________________________________

3.What did the author feel most pleased about? (No more than 8 words)

____________________________________________________________________________

4.How did the author feel when he saw large quantities of books in the bookshop? (No more than 6 words)

____________________________________________________________________________

5.What kind of books does the author buy occasionally now? (No more than 10 words)

____________________________________________________________________________

高三英语其他题中等难度题查看答案及解析

The majority of employers are planning to cut down on wages＿＿＿＿the economic crisis.

A. by means of　 B. in defence of

C. in reaction to 　D. with regard to

高三英语单项填空中等难度题查看答案及解析

Throughout the world, the majority of the employers are planning to cut down on wages_______ the economic crisis.

A. with regard to    B. in defense of

C. by means of    D. in reaction to

高三英语单项填空中等难度题查看答案及解析

________ hard you try，it is difficult to lose weight without cutting down the amount you eat.(2012·湖南)

A．However　 B．Whatever　 C．Whichever　 D．Whenever

高三英语单项填空中等难度题查看答案及解析

________hard you try，it is difficult to lose weight without cutting down the amount you eat.                    　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 (2012·湖南，32)

A．However　                     B．Whatever

C．Whichever　                     D．Whenever

高三英语单项填空中等难度题查看答案及解析

_______hard you try, it is difficult to lose weight without cutting down the amount you eat .

A. However    B. Whatever    C. Whichever      D. Whenever

高三英语单项填空中等难度题查看答案及解析

_______ hard you try，it is difficult to lose weight without cutting down the amount you eat．

A． Whichever　　　　　 B． Whatever

C． However　　　　　　 D． Whoever

高三英语单项填空中等难度题查看答案及解析