Some plants are very ____ to light; they prefer the shade.
A. sensible B. available
C. adjustable D. sensitive
高三英语单项填空中等难度题
Some plants are very ____ to light; they prefer the shade.
A. sensible B. available
C. adjustable D. sensitive
高三英语单项填空中等难度题查看答案及解析
Some plants are vey ____ to light; they prefer the shade.
A. sensible B. available
C. adjustable D. sensitive
高三英语单项填空中等难度题查看答案及解析
Companion planting is the idea that when some crops are planted together, they help each other grow. The compatible plants generally have similar needs for nutrients, soil and moisture.
Advice for companion plantings is sometimes based more on tradition than proof. But Fabian Fernandez at the University of Illinois says there is evidence for some combinations. These can lead to better crops, reduce disease and help with pest control by attracting helpful insects. For example, some kinds of soil bacteria take nitrogen(氮) from the air and make a form that plants can use. The plants keep the nitrogen in their roots. Legumes(豆类) are especially good at this. Any crops sharing the same space can get the nitrogen as the roots decompose(腐烂).
Crops like beans and potatoes, carrots and cabbages, beans and rice can also share territory well because their roots reach different levels in the soil. Deep-rooted vegetables get nutrients and moisture from lower down, so they do not compete with shallower plants. But some plants placed together may harm each other's development. For example, tomatoes do not like wet soil but watercress does, as the name suggests. So you would probably not want to put them together.
Even after harvest, some kinds of produce should be kept apart. Apples, for example, release ethylene gas,a plant hormone. It can cause other foods to ripen(成熟)too quickly. Markets often separate high ethylene-producing foods from those that are sensitive to the gas. But sometimes you might want them together. For example, if you put an apple in a bag with a green banana, the banana will be ready to eat sooner.
Now what about peaches, plums and nectarines that are too firm to eat? Growers in California answer this question at eatcaliforniafruit.com. They say an apple,a banana or a riper piece of fruit is not needed. The peaches, plums and nectarines themselves release enough of the gas to ripen successfully.
Here's their advice: place the fruit in afruit bowl or in a paper bag with the top folded over. Keep the fruit at room temperature. When the fruit is soft enough to your liking, either use it or place it in a refrigerator to stop further ripening.
1.What are the basic needs for companion planting?
A. Good old companions. B. Some kinds of soil bacteria.
C. Nutrients, soil and moisture. D. Helpful insects.
2.What does the underlined sentence in Paragraph 2 most probably mean?
A. To some extent, companion planting relies more on traditional experience.
B. In the field of companion planting, proof always speaks louder than tradition.
C. Traditional experience is much less reliable than scientific experiments.
D. Scientific researches have thrown light on the theory of companion planting.
3.According to the text, which group of plants are not suitable to be planted together?
A. Beans and potatoes. B. Tomatoes and watercress.
C. Carrots and cabbages. D. Beans and rice.
4.What can be inferred from the last two paragraphs?
A. We should choose fruit from markets as often as possible.
B. The peaches, plums and nectarines should always be put together to get riper.
C. The fruit in afruit bowl or in a paper bag should be eaten as soon as possible.
D. We should not place any ripening fruit out in direct sunlight.
高三英语阅读理解中等难度题查看答案及解析
Redwood trees are the tallest plants on the earth，reaching heights of up to 100 meters．They are also known for their longevity，typically 500 to 1000 years，but sometimes more than 2000 years．A hundred million years ago，in the age of dinosaurs，redwoods were common in the forests of a much more moist and tropical North America．As the climate became drier and colder，they declined to a narrow strip along the Pacific coast of Northern Califomia．
The trunk of redwood trees is very strong and usually forms a single straight column．It is covered with a soft bark．This bark can be pretty thick，well over two feet in the more mature trees．It gives the older trees a certain kind of protection from insects，but the main benefit is that it keeps the center of the tree harmless from moderate forest fires because of its thickness．This fire resistant quality explains why the giant redwood grows to live that long．While most other types of trees are destroyed by forest fires，the giant redwood actually prospers because of them．
Moderate fires will clear the ground of competing plant life，and the rising heat dries and opens the ripe fruit of the redwood，releasing many thousands of seeds onto the ground below．
New trees are often produced from shoots，little baby trees，which form at the base of the trunk．These shoots grow slowly，fed by the root system of the “mother’’ tree．When the main tree dies，the shoots are then free to grow as full trees，forming a “fairy ring” of trees around the original tree．These trees，in turn，may give rise to more shoots，and the cycle continues．
1.Why were redwood trees easier to find in the forests of North America millions of years ago?
A．The trees were taller and stronger．
B．The soil was softer for seeds to develop．
C．The climate there was warmer and wetter．
D．The temperature was lower along the Pacific coast．
2.Which of the following is a function of the tree bark as mentioned in the passage?
A．It allows redwood trees to bear seeds．
B．It prevents redwood trees from attack by insects．
C．It helps redwood trees absorb water in the air．
D．It makes redwood trees more beautiful and appealing．
3.Why do redwood trees grow to live that long according to the passage?
A．They have heavy and straight tree trunks．
B．They are properly watered and catered to．
C．They are more resistant to fire damage than other trees．
D．They produce many young trees to maintain their life cycle．
4.How does a “fairy ring’’ form according to the passage?
A．By killing an old tree． B．By connecting root systems．
C．By inserting holes into old trees． D．By surrounding a mature tree．
高三英语阅读理解中等难度题查看答案及解析
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Some students prefer to learn by themselves. They think they can learn better in this way because they have more freedom, pressure and independence. There is some truth in their way.
1. It is better to have a teacher, especially when they learn something more difficult.
First, a teacher can act as a guide to lead you to success. When you learn, you need help and advice. A teacher will give you a hand when you face difficulties. 2.
What is more, a teacher puts real pressure on you. If you study by yourself, you must be strong-minded enough to keep on. 3. But under the guidance of a teacher, you will feel there is always someone to watch you. The teacher may give you homework to do. You must complete the homework, or you will not pass the course.
Last but not least, studying with a teacher will help you receive the benefit of the teacher’s knowledge. 4. They teach students how to learn and how to obtain information. They guide all of you in class to discuss the material and provide extra material to broaden the scope of the topic.
5. I choose to learn in a big family---my school. Without a teacher, I would feel there would be no fun and no pressure. I could not learn well in such dull and depressing circumstances.
A. Besides, teachers are connected with our life.
B. Teachers can help you solve all of your problems.
C. In short, I prefer to go to class studying with a teacher.
D. Without a guide, you would be searching in darkness.
E. And you may become inactive for lack of a strong will.
F. But they fail to see the advantages of learning with a teacher.
G. In class, teachers do more than just going over the material in the text.
高三英语七选五中等难度题查看答案及解析
Lions are opportunists. They prefer to eat without having to do too much work. When resting in the shade, they are also watching the sky to see what is flying by, and even in the heat of the day they will suddenly start up and run a mile across the plains to find out what is going on. If another animal has made a kill, they will drive it off and take the dill for themselves. A grown lion can easily eat 60 pounds of meat at a single feeding. Often they eat until it seems painful for them to lie down.
The lionesses (母狮) , being thinner and faster, are better hunters (猎手) than the males (雄狮). But the males don’t mind. After the kill they move in and take the rest share.
Most kills are made at night or just before daybreak. We have seen many, many daylight attempts but only ten kills. Roughly, It’s about twenty daytime attempts for one kill.
When lions are hiding for an attack by a water hole, they wait patiently and can change at any second. The kill is the exciting moment in the day-to-day life of the lion, since these great animals spend most of their time, about 20 hours a day, sleeping and resting.
Lions are social cats, and when they are having a rest, they love to touch each other. After drinking at a water hole, a lioness rests her head on another’s back. When walking, young lions often touch faces with older ones, an act of close ties among members of the group.
1.By describing lions as “opportunists” in the first paragraph, the author means to say that lions ________.
A. are cruel animals B. are clever animals
C. like to take advantage of other animals D. like to take every chance to eat
2.According to the text, which of the following is true?
A. Lions make most kills in the daytime.
B. Males care more about eating than active killing.
C. Lions are curious about things happening around them.
D. It doesn’t take lions too much time to make a kill.
3.How can we know that lions are social animals?
A. They depend on each other. B. They look after each other well.
C. They readily share what they have. D. They enjoy each other’s company.
4.What would be the best title for the text?
A. Powerful Lions B. Lions at Work and Play
C. Lions, Social Cats D. Lions, Skilled Hunters
高三英语阅读理解中等难度题查看答案及解析
Lions are opportunists. They prefer to eat without having to do too much work. When resting in the shade, they are also watching the sky to see what is flying by, and even in the heat of the day they will suddenly start up and run a mile across the plains to find out what is going on. If another animal has made a kill, they will drive it off and take the dill for themselves. A grown lion can easily eat 60 pounds of meat at a single feeding. Often they eat until it seems painful for them to lie down.
The lionesses, being thinner and faster, are better hunters than the males. But the males don’t mind. After the kill they move in and take the test share.
Most kills are made at night or just before daybreak. We have seen many, many daylight attempts but only ten kills. Roughly, it’s about twenty daytime attempts for one kill.
When lions are hiding for an attack by a water hole, they wait patiently and can charge at any second. The kill is the exciting moment in the day-to-day life of the lion, since these great animals spend most of their time, about 20 hours a day, sleeping and resting.
Lions are social cats, and when they are having a rest, they love to touch each other. After drinking at a water hole, a lioness rests her head on another’s back. When walking, young lions often touch faces with older ones, an act of close ties among members of the group.
1.By describing lions as “opportunists” in the first paragraph, the author means to say that lions ________.
A. like to take advantage of other animals B. are clever animals
C. are cruel animals D. like to take every chance to eat
2.According to the text, which of the following is true?
A. Lions make most kills in the daytime.
B. It doesn’t take lions too much time to make a kill.
C. Males care more about eating than active killing.
D. Lions are curious about things happening around them.
3.How can we know that lions are social animals?
A. They depend on each other. B. They look after each other well.
C. They readily share what they have. D. They enjoy each other’s company.
4.What would be the best title for the text?
A. Lions, Skilled Hunters B. Lions, Social Cats
C. Lions at Work and Play D. Powerful Lions
高三英语阅读理解中等难度题查看答案及解析
. Some inventions are well received, but _____ function, they aren't very successful.
A. according to B. in terms of C regardless of D. owing to
高三英语单项填空简单题查看答案及解析
Some villagers are resting themselves in ____shade.
A. a B.an C.the D. /
高三英语单项填空简单题查看答案及解析
Algae(水藻) are very simple plants． They grow in fresh water or salty water． Seaweed is algae that grow in salty water． Seaweed is red or brown in color． The Japanese people use these plants from the sea in many ways． From it, they make a food called Kombu． Kombu is seaweed that has been dried, cooked and pressed together． Then it is dried again and cut into long pieces． The Japanese eat a lot of Kombu and like it very much．
Japanese farmers often use seaweed as fertilizer． It makes their plants grow better． Many farmers also find seaweed makes a fine food for their animals．
From seaweed the Japanese also get iodine(碘), which they sell to other countries． Iodine is used in many ways all over the worlD． It is used in making medicine． It is added to the salt we use at the table． Scientists even use one form of iodine to “ seed clouds” when they want rain to fall．
1.Kombu is a kind of ____ according to the text．
A． plant
B． medicine
C． food
D． fertilizer
2.In the last sentence of the text, “seed clouds” means ____．
A． clouds spreading like seeds
B． the seeds like clouds
C． to make rain fall with human power
D． dropping seeds by clouds
3.The main idea of the story is that ____．
A． The Japanese eat seaweed when they want rain to fall．
B． Kombu is made into medicine for farmers．
C． The Japanese use seaweed in many ways．
D． The Japanese eat a lot of Kombu．
高三英语阅读理解中等难度题查看答案及解析