Mulch is a protective cover of material that is spread on top of soil.It is usually made out of organic material, like crop waste.Farmers may keep the remains of maize or other crops on top of the soil.This creates mulch on the soil surface.The plant remains help protect the soil against wind and water damage.Mulching is one of the best things people can do for their plants.It also helps keep the soil from getting dry, and reduces the need for watering plants.It also limits temperature changes in the soil.And it stops unwanted plants, or weeds,from growing.
Organic mulch improves the condition of soil.As the mulch breaks down, it provides material which keeps the soil from getting hard.This improves the growth of roots and increases the movement of water through the soil.It also improves the ability of the soil to hold water. Organic mulch contains nutrients for plants.It also provides a good environment for earthworms and other helpful organisms in the soil.
It is easy to find organic mulch materials.Cutup leaves and small pieces of tree bark can be used.Grass cuttings are also a good mulch for plants. Mulch from newspapers works well in controlling weeds.
The best time to add mulch depends on your goal.Mulch provides a thick barrier between the soil and the air.This helps to reduce temperature changes in the soil. As a result,mulched soil will be cooler than other soil in the summer.In winter, the mulched soil may not freeze as deeply as other soil.The best time is after the ground has frozen, but before the coldest weather arrives.Spreading mulch before the ground has frozen may attract small animals searching for a warm place to spend the winter.Delaying the spreading should prevent this problem.The animals will probably find another place to live.
1.The author tells us the following EXCEPT________.
A.what mulch is and its benefits
B.the best time to add mulch
C.what can be mulched on the soil surface
D.the bad effects of mulch
2.The following can be used as organic materials to make mulch EXCEPT________.
A.tree barks B.cutup leaves
C.grass cuttings D.plastic
3.Which of the following is the benefit of mulch?
A.Protecting the soil against wind and water damage.
B.Keeping the soil wet and reducing the need for watering plants.
C.Reducing temperature changes in the soil and stopping unwanted weeds
growing.
D.All of the above.
4.The main idea of Paragraph 2 is that organic mulch can________.
A.improve the condition of soil
B.improve the ability of the soil to hold water
C.provide a good environment for earthworms
D.improve the growth of roots and increase the movement of water through the
soil
5.From the last paragraph, we know ________.
A.the best time to add mulch is in spring and summer
B. the best time to add mulch is after the coldest weather arrives
C.the best time to add mulch depends on weather
D.choosing the best time to add mulch can avoid attracting small animals
高三英语阅读理解中等难度题
Mulch is a protective cover of material that is spread on top of soil.It is usually made out of organic material, like crop waste.Farmers may keep the remains of maize or other crops on top of the soil.This creates mulch on the soil surface.The plant remains help protect the soil against wind and water damage.Mulching is one of the best things people can do for their plants.It also helps keep the soil from getting dry, and reduces the need for watering plants.It also limits temperature changes in the soil.And it stops unwanted plants, or weeds,from growing.
Organic mulch improves the condition of soil.As the mulch breaks down, it provides material which keeps the soil from getting hard.This improves the growth of roots and increases the movement of water through the soil.It also improves the ability of the soil to hold water. Organic mulch contains nutrients for plants.It also provides a good environment for earthworms and other helpful organisms in the soil.
It is easy to find organic mulch materials.Cutup leaves and small pieces of tree bark can be used.Grass cuttings are also a good mulch for plants. Mulch from newspapers works well in controlling weeds.
The best time to add mulch depends on your goal.Mulch provides a thick barrier between the soil and the air.This helps to reduce temperature changes in the soil. As a result,mulched soil will be cooler than other soil in the summer.In winter, the mulched soil may not freeze as deeply as other soil.The best time is after the ground has frozen, but before the coldest weather arrives.Spreading mulch before the ground has frozen may attract small animals searching for a warm place to spend the winter.Delaying the spreading should prevent this problem.The animals will probably find another place to live.
1.The author tells us the following EXCEPT________.
A.what mulch is and its benefits
B.the best time to add mulch
C.what can be mulched on the soil surface
D.the bad effects of mulch
2.The following can be used as organic materials to make mulch EXCEPT________.
A.tree barks B.cutup leaves
C.grass cuttings D.plastic
3.Which of the following is the benefit of mulch?
A.Protecting the soil against wind and water damage.
B.Keeping the soil wet and reducing the need for watering plants.
C.Reducing temperature changes in the soil and stopping unwanted weeds
growing.
D.All of the above.
4.The main idea of Paragraph 2 is that organic mulch can________.
A.improve the condition of soil
B.improve the ability of the soil to hold water
C.provide a good environment for earthworms
D.improve the growth of roots and increase the movement of water through the
soil
5.From the last paragraph, we know ________.
A.the best time to add mulch is in spring and summer
B. the best time to add mulch is after the coldest weather arrives
C.the best time to add mulch depends on weather
D.choosing the best time to add mulch can avoid attracting small animals
高三英语阅读理解中等难度题查看答案及解析
How to protect children Web fans from unsuitable material on-line while encouraging them to use the Internet has long been discussed in the U. S.
For some parents, the Internet can seem like a jungle, filled with danger for their children. 1. With good guides, some education,and a few precautions(预防措施), the wilds of the Internet can be safely navigated(航行). “Kids have to be on-line. If we tell our kids they can’t have access (机会) to the Internet, we’re cutting them off from their future,” said an expert.
Most kids have started to use search engines. 2. There are search engines designed just for kids. A certain software contains only sites that have been selected as safe. 3. But this can’t be wholly reliable(可靠), and the best thing parents can do is to talk to their kids and let them know what is OK or not OK to see or do on the Internet.
4.
A few other tips
● Don’t put the PC in a child’s room but keep it in an area where mum or dad can keep an eye on things. That also makes the Internet more of a family activity.
● Ask your child what he or she has been doing and about any friends they make on-line.
● 5.
● And tell your children never to talk to anyone they meet on-line over the phone, send them anything, accept anything from them or agree to meet with them unless you go along.
A. The most popular way to limit access would be to use what is known as a “content screener(过滤器)”.
B. Many of them are great for finding tons of interesting Internet sites, and they can also locate places where you might not want your kids to go.
C. Tell your child not to give on-line strangers personal information, especially like address and phone number.
D. But jungles contain wonders as well as dangers.
E. Tell your child not to talk to any strangers.
F. Another way is that mum or dad is nearby when the child is surfing(浏览) the Internet.
G. And also parents can help the child in trouble.
高三英语七选五中等难度题查看答案及解析
One of the requirements for a fire is that the material _________ to its burning temperature.
A. is heated B. be heated C. would be heated D. shall be heated
高三英语单项填空中等难度题查看答案及解析
One of the requirements for the experiment is that the material _____ to its burning temperature.
A.is heated B.will be heated C.be heated D.would be heated
高三英语单项填空中等难度题查看答案及解析
It looked to all the world like something that might have graced the cover of a 1950s comic book. On September 28th, on a warm Texas evening, Elon Musk, the boss of SpaceX, a rocketry firm, introduced his company's newest machine, Starship Mkl. It stands 50 metres tall and is made from shiny plates of stainless steel. Despite its name, it is not in fact an interstellar (恒星之间的) spacecraft. But it is a prototype (雏形)of an interplanetary one. Mr Musk hopes, one day, to use its successors to ferry passengers to the Moon or to Mars — or perhaps even, according to one piece of SpaceX concept art, all the way to Saturn (土星).
In the 17 years since its founding, SpaceX’s cheap, reusable machines have revolutionised the rocket business. The firm's ukra-low prices have seen it seized a dominant share of the commercial satellite-launching market. Along with Boeing, an American aerospace giant, SpaceX is responsible for ferrying supplies to the International Space Station, It may soon fly astronauts there as well. But all of this commercial success is merely a necessary first step in Mr Musk’ bigger plan, which is to make humanity into a "niultiplanetary species" by establishing colonies in the universe.
That is where the Starship comes in. The prototype on display in Texas is only one half of an enormous rocket stack designed with planetary colonisation in mind. When paired with a Falcon Super Heavy booster (助推火箭),which is also being developed, the result should be able of lifting around 150 tonnes into orbit. That would make it the most powerful rocket ever built, superior to the Saturn V, which sent astronauts to the Moon in the 1960s and 1970s. And unlike the Saturn V, whose three stages were abandoned to the sea or to space as their fuel was used up, the Starship and its booster will be reusable which should keep costs down.
It is a bold plan. Mr Musk's shorter-term plans are bold too. Besides designing a new spaceship and booster, SpaceX engineers are busy working on a new. more efficient engine to power them. Called Raptor, it is designed to bum super-cold methane rather than the kerosene that fuels the company's current Merlin engines. The Starship will sport six Raptor engines. But each Super Heavy booster will need somewhere between 24 and 37. The result will be a repairman's nightmare.
Mr Musk has said, perhaps optimistically, that a Starship prototype might be ready for a test flight all the way to orbit (although without its booster stage) within six months. That would be of a piece with its crazy development schedule. The traditional rocket-building industry is used to generous government contracts that are about job creation as much as rocket creation. However, SpaceX has adopted a different approach, closer to the rapid-fire development practices of the software industry.
The Starship prototype, for instance, was put together in a matter of months. It was built out in the open, rather than in a carefully controlled factory environment. The firm has two teams competing against each other to produce the best design,
1.What is the passage mainly about?
A.Starship Mkl VS Satum V
B.Development of space travel
C.A promising company in the rocket business
D.Starship Mk 1, a new kind of rocket in a sense
2.Which of the following statements is NOT true according to the passage?
A.Starship Mkl was designed to beat Boeing and dominate the market.
B.SpaceX aims to realize interplanetary travel and set up space colonies.
C.SpaceX is not dependent on the government's contracts to expand its business.
D.Starship Mkl beats Satum V in that it is recyclable, cost-saving and more powerful.
3.What does the underlined sentence in Paragraph 4 probably mean?
A.Repairmen hate working with a powerful rocket.
B.The special fuel is in great demand and not always available.
C.Ifs no easy job to equip the rocket with the engines needed.
D.Too many engines may bring about great trouble once going wrong.
高三英语阅读理解中等难度题查看答案及解析
You maybe surprised to learn that one of the best steps you can take to protect your health is to step outside and spend some time in the grass, dirt and water.
Our ancestors enjoyed the healing power of nature,and now scientists are starting to catch up.According to research in recent years,just having a view of nature has been shown to improve hospital patients' recovery and reduce illness rates among office workers.Also,exposure(曝露) to wildlife,horseback riding,hiking,camping and farms can be helpful for a variety of health conditions in adults and children.
Much of this type of research is focusing on children,and in fact an entire movement has quickly developed to connect kids with the healing power of nature.
Obesity(肥胖).Rates of childhood obesity have grown sharply in recent years,and this is partly because of reduced outdoor activity time.Increasing the time students spend learning about nature,both in and outside the classroom,would help solve this problem.Such lessons are often more attractive for students and often lead them to become more active outside.
Attention deficit hyperactivity disorder(ADHD)(注意力缺失症).Exposure to ordinary natural settings in the course of common afterschool and weekend activities may be effective in reducing attention deficit symptoms in children.Participation in green activities—such as nature walks—helped ADHD patients from a wide range of backgrounds to stay focused and complete tasks.
Stress.Access to nature,even houseplants,can help children cope with stress.
Depression and seasonal emotional disorder.Major depression requires medical treatment,but physical activity,especially outdoors,can help ease symptoms.For your average case of winter blues,experts suggest spending time outside every day and,if possible,taking the family to a sunny vacation spot in midwinter.
Experts emphasize that you needn't go to wilderness preserves to enjoy nature's benefits—simply walking in a city park or growing in a rooftop garden can make a difference.
1.It can be inferred from the first two paragraphs that .
A.ancient people were not familiar with the healing power of nature.
B.modern people are not familiar with the healing power of nature.
C.the healing power of nature works better on children.
D.the healing power of nature works better on office workers.
2.According to Para.4, lessons about nature ________.
A.should engage parents in them
B.should take place outdoors
C.are used widely at schools
D.are liked by students
3.Exposure to green areas in neighborhoods can .
A.improve children's skills at learning
B.help reduce ADHD symptoms
C.treat major depression
D.cure winter blues
4.What can be inferred from the last paragraph?
A.You can only enjoy nature's benefits in the wilderness.
B.A common natural setting is beneficial to your health.
C.A city park and a rooftop garden have different benefits.
D.Too many people in the wilderness will reduce the benefits of nature.
高三英语阅读理解困难题查看答案及解析
You maybe surprised to learn that one of the best steps you can take to protect your health is to step outside and spend some time in the grass, dirt and water.
Our ancestors enjoyed the healing power of nature , and now scientists are starting to catch up.According to research in recent years, just having a view of nature has been shown to improve hospital patients' recovery and reduce illness rates among office workers.Also, exposure (曝露)to wildlife, horseback riding, hiking, camping and farms can be helpful for a variety of health conditions in adults and children.
Much of this type of research is focusing on children, and in fact an entire movement has quickly developed to connect kids with the healing power of nature.
Obesity (肥胖).Rates of childhood obesity have grown sharply in recent years, and this is partly because of reduced outdoor activity time.Increasing the time students spend learning about nature, both in and outside the classroom, would help solve this problem.Such lessons are often more attractive for students and often lead them to become more active outside.
Attention deficit hyperactivity disorder (ADHD) (注意力缺失症).Exposure to ordinary natural settings (环境) in the course of common after-school and weekend activities may be effective in reducing attention deficit symptoms in children.Participation in green activities —such as nature walks—helped ADHD patients from a wide range of backgrounds to stay focused and complete tasks.
Stress.Access to nature, even houseplants, can help children cope with stress.
Depression and seasonal emotional disorder.Major depression requires medical treatment, but physical activity, especially outdoors, can help ease symptoms.For your average case of winter blues, experts suggest spending time outside every day and, if possible, taking the family to a sunny vacation spot in mid-winter.
Experts emphasize that you needn' t go to wilderness preserves to enjoy nature' s benefits—simply walking in a city park or growing in a rooftop garden can make a difference.
1.It can be inferred from the first two paragraphs that____.
A.ancient people were not familiar with the healing power of nature.
B.modern people are not familiar with the healing power of nature.
C.the healing power of nature works better on children.
D.the healing power of nature works better on office workers.
2.According to Para.4, lessons about nature_____.
A.should engage parents in them
B.should take place outdoors
C.are used widely at schools
D.are liked by students
3.Exposure to green areas in neighborhoods can_____.
A.improve children' s skills at learning
B.help reduce ADHD symptoms
C.treat major depression
D.cure winter blues
4.What can be inferred from the last paragraph?
A.You can only enjoy nature's benefits in the wilderness.
B.A common natural setting is beneficial to your health.
C.A city park and a rooftop garden have different benefits.
D.Too many people in the wilderness will reduce the benefits of nature.
高三英语阅读理解中等难度题查看答案及解析
Getting enough sleep on a regular basis is one important way to protect the health of your heart. Poor sleep is associated with a range of cardiovascular(心血管的) problems, including high blood pressure, heart attack, and heart failure. Both men and women are at increased risk for these conditions. But we continue to learn that when it comes to health problems associated with sleep, the particular risks to men and women are not always the same. A new study suggests that for women who already have heart disease, poor sleep may be particularly dangerous to their heart health.
Research indicates that poor-quality sleep—and waking too early in particular—is associated with increased inflammation(炎症) among women with heart disease. There was no similar association found for men, suggesting that women with heart disease and sleep problems may be at particular risk for inflammation that can be damaging to the heart.
Researchers at the University of California, San Francisco investigated the relationship between sleep quality and inflammation linked to coronary(冠状的) heart disease. They also sought information about how an association between sleep and inflammation might differ between men and women. Their investigation included 980 men and women at first, and 626 completed the 5-year study. All of those included were suffering for coronary heart disease. The average age of men in the study was 66. Women were slightly younger, with an average age of 64. Researchers measured sleep quality by asking participants to rate their sleep over the previous month. They also asked for reports of some of the most common sleep problems, including difficulty falling asleep, difficulty staying asleep, waking frequently throughout the night, and waking too early in the morning.
After 5 years, researchers repeated tests for inflammation and once again sought reports on sleep quality and sleep problems. When they analyzed data for both men and women together, researchers found no links between inflammations and sleep quality. However, when they analyzed data taking gender(性别) into account, researchers found a relationship between inflammation and sleep existed for women, but not for men.
1.When a person suffers from sleep disorder _______.
A. he/she is sure to have cardiovascular problems
B. he/she may be in a state of poor health
C. he/she must be in danger of heart disease
D. he/she might get on poorly with others
2.What is the purpose of the author in writing the passage?
A. To stress how to have a good sleep in daily life.
B. To show a good sleep is more important to women.
C. To describe different kinds of sleep problems.
D. To encourage readers to sleep more.
3.The researchers did the study _______.
A. to find a cure for women with heart disease
B. to know what contributes to inflammation
C. to look into the relationship between sleep quality and inflammation
D. to track the lifestyle of men and women
4.Which of the following is the suitable title for the passage?
A. Poor Sleep Results in Problems Only for Adults
B. Lack of Sleep Can Lead to Much Inflammation
C. Sleep Loss Is to Increase Anxiety Disorders
D. Women’s Sleep Habits May Affect Heart Health
高三英语阅读理解中等难度题查看答案及解析
1.The main aim of Environment Awareness Week is to _____.
A.educate the public on protecting the environment
B.discuss global warming and other environmental problems
C.explain ways for producing freshwater to save the environment
D.learn about renewable energy sources that protect the environment
2.The organizer of the event is _____.
A.Global Gaia Network B.Clean Energy Agency
C.Green Earth Foundation D.International Environment Fund
3.If you are interested in renewable energy sources, you should go to _____.
A.Hall 1 B.Hall 2 C.Hall 3 D.Hall 4
4.The "3 Rs" stand for _____.
A.Read, Realize and Remember B.Reduce, Reuse and Recycle
C.Green Earth Foundation D.Global Gaia Network
5.Which of the following statements is NOT true of the event?
A.It will last a week and the halls will be open 11 hours a day.
B.You can send an email to Mrs.Daisy Soh for more information.
C.Each hall charges the same amount of money as the other.
D.Lectures in Hall 1 will be given by university students.
高三英语阅读理解简单题查看答案及解析
1.The main aim of Environment Awareness Week is to _____.
A. educate the public on protecting the environment
B. discuss global warming and other environmental problems
C. explain ways for producing freshwater to save the environment
D. learn about renewable energy sources that protect the environment
2.The organizer of the event is _____.
A. Global Gaia Network
B. Clean Energy Agency
C. Green Earth Foundation
D. International Environment Fund
3.Which of the following statements is NOT true of the event? ________
A. It will last a week and the halls will be open 11 hours a day.
B. You can send an email to Mrs. Daisy Soh for more information.
C. Each hall charges the same amount of money as the other.
D. Lectures in Hall 1 will be given by university students.
高三英语阅读理解中等难度题查看答案及解析