Lichens (地衣) are difficult to see. They don’t move. They often mix into the living place. You might not even recognize one if you are looking right at it.
Lichens live on rocks, branches, houses, and even metal street signs. You can find these colorful organisms (微生物) almost everywhere — from deserts to rainforests, and from Antarctica to Africa. They’ve traveled in outer space, and some scientists think there might even be lichens on Mars.
What you probably don’t realize is that a lichen is more than a single thing. It includes two different types of living organisms: a fungus (菌类) and an alga (藻类). Neither of these organisms is a plant, so the lichen isn’t a plant either.
Through photosynthesis (光合作用), the alga gets the sun’s energy to make food for the fungus, which is the place for the alga to live in. However, the alga cannot leave the fungus.
Around the world, scientists have found tens of thousands of types of lichens. Many may not even have been discovered yet. As scientists continue to find new kinds of lichens, they are also working to understand how they are connected to one another. By putting together a lichen family tree, they hope to understand why so many different types of lichens have grown in so many places around the world.
Many researchers are trying to understand basic facts about the organisms and their connections. Researchers are also using lichens to examine the health of the environment.
1.What do we know about lichens according to the passage?
A. They will die if they leave Earth.
B. There are more lichens than plants on Earth.
C. They look similar to the environment around them.
D. They are too small to be easily seen by people.
2.What does the second paragraph mainly talk about?
A. The way lichens live.
B. The natural environment of lichens.
C. The way lichens work as organisms.
D. The family tree of lichens.
3.Which of the following statements is NOT the scientists’ purposes of studying lichens?
A. To understand basic facts about them.
B. To creat a lichen family tree.
C. To understand how lichens are related to each other.
D. To understand why lichens can live in different places.
4.We can know from the passage that __________.
A. lichens can be used to better understand the environment
B. lichens don’t have any differences in colors or sizes
C. lichens don’t use photosynthesis like a green plant
D. scientists have discovered every kind of lichen
高二英语阅读理解简单题
Lichens (地衣) are difficult to see. They don’t move. They often mix into the living place. You might not even recognize one if you are looking right at it.
Lichens live on rocks, branches, houses, and even metal street signs. You can find these colorful organisms (微生物) almost everywhere — from deserts to rainforests, and from Antarctica to Africa. They’ve traveled in outer space, and some scientists think there might even be lichens on Mars.
What you probably don’t realize is that a lichen is more than a single thing. It includes two different types of living organisms: a fungus (菌类) and an alga (藻类). Neither of these organisms is a plant, so the lichen isn’t a plant either.
Through photosynthesis (光合作用), the alga gets the sun’s energy to make food for the fungus, which is the place for the alga to live in. However, the alga cannot leave the fungus.
Around the world, scientists have found tens of thousands of types of lichens. Many may not even have been discovered yet. As scientists continue to find new kinds of lichens, they are also working to understand how they are connected to one another. By putting together a lichen family tree, they hope to understand why so many different types of lichens have grown in so many places around the world.
Many researchers are trying to understand basic facts about the organisms and their connections. Researchers are also using lichens to examine the health of the environment.
1.What do we know about lichens according to the passage?
A. They will die if they leave Earth.
B. There are more lichens than plants on Earth.
C. They look similar to the environment around them.
D. They are too small to be easily seen by people.
2.What does the second paragraph mainly talk about?
A. The way lichens live.
B. The natural environment of lichens.
C. The way lichens work as organisms.
D. The family tree of lichens.
3.Which of the following statements is NOT the scientists’ purposes of studying lichens?
A. To understand basic facts about them.
B. To creat a lichen family tree.
C. To understand how lichens are related to each other.
D. To understand why lichens can live in different places.
4.We can know from the passage that __________.
A. lichens can be used to better understand the environment
B. lichens don’t have any differences in colors or sizes
C. lichens don’t use photosynthesis like a green plant
D. scientists have discovered every kind of lichen
高二英语阅读理解简单题查看答案及解析
_____ I admit that all these problems are difficult, I don’t agree that they cannot be solved.
A.Unless B.While C.Until D.Since
高二英语单项填空中等难度题查看答案及解析
______ I admit that all these problems are difficult, I don’t agree that they can’t be solved.
A. Unless B. While C. Until D. Since
高二英语单项填空中等难度题查看答案及解析
Malka and Shaindle are sisters. Although they live an hour's drive from each other and don’t see each other often, they are in touch. Malka has a large family. Shaindle, however, has had difficulty having children.
Malka had just given birth to another son. Shaindle , married three years and still childless, was receiving fertility(生育) treatments. Involved with work, doctor’s visits, and medical treats, she was unable to make the trip to visit her sister after she had given birth.
Malka knew her sister’s problem and was quite understanding. Shaindle and her husband Feivel would be at the haptismal (洗礼) ceremony,of course.
On the day of the haptism, Shaindle and Feivel arrived early, earlier than Malka and her family. Malka’s mother-in-law, Yehudit, was already at the hall. “Hello,” said Shaindle cheerfully, never thinking what was about to happen.
Yehudit turned to her angrily and said, “What a selfish sister you are! Never once did you see fit to visit Makla this entire week! No wonder you have no children!”
Shaindle went into shock at her words. She turned away, her eyes filled with tears. The accusation(控诉) had cut Shaindle like a knife. She was psychologically bleeding. Poor Shaindle couldn’t calm down. It took a while before she could regain her calmness. She couldn’t look at Yehudit; it was just too painful for her to do so.
The minute the words had escaped Yehudit’s mouth, she knew she had crossed a red line. She had stepped on very raw toes and felt regretted for her words –but it was too late. Her attempts to apologize were ineffective. The celebration had suddenly turned sour in just a matter of seconds. After all these years, the memory of that happening lingers on …
1. Shaindle didn’t visit her sister after her sister gave birth because______________.
A. she was jealous of her sister
B. she lived far from her sister
C. she was too busy to visit her
D. she didn’t feel quite herself
2. The underlined part “stepped on very raw toes” probably means_____________.
A. make fun of somebody
B. hurt somebody deeply
C. meet somebody by accident
D. be impolite to somebody
3.We can learn from the last paragraph that_____________.
A. Shaindle didn’t forgive Yehudit for many years
B. Shaindle burst out anger at Malka’s mother-in-law
C. Yehudit didn’t realize how her words could affect Shaindle
D. Shaindle couldn’t get rid of the bad memory for many years
4.The purpose of the passage is to tell us ___________.
A. words sometimes can really hurt us
B. sisters should care for each other
C. we should forget unpleasant things
D. two sisters’ different experiences
高二英语阅读理解中等难度题查看答案及解析
_____ some teenagers don’t realize is ____ difficult life can be after they get addicted to drugs.
A. What; how B. That; how C. That; what D. What ; what a
高二英语单项填空中等难度题查看答案及解析
A lot of measures have been taken recently, of benefits, however, some are difficult to see in the short term.
A. what B. whose C. which D. whom
高二英语单项填空中等难度题查看答案及解析
1.What some teenagers don’t realize is _________difficult life can be after they get addicted to drugs.
2.It suddenly_________(occur) to him that he had left his keys in the office.
3._________is clear is that taking part in some voluntary work is helpful to students.
4.There is a great deal of evidence _________(indicate) that music activities lift our spirits.
5.From the date _________(mark) out on the calendar, I know he will be busy next week.
6._________last leaves the classroom should turn off the lights .
7.-----Where did you meet him for the first time?
-----It was in the factory _________we once worked ten years ago.
8.He is opposed to sending the child to kindergarten, and that is _________I disagree.
9.________(strike) by serious flood, the city has to be restored as soon as possible.
10.My mother is grateful to the surgeon, without ________ help she would have died from her heart attack.
11.I would like to buy five ________(loaf) of bread.
12.________(short) after he graduated from college, he set up his own business.
13.He has failed the job interview, which will have a great impact ________his future.
14.A great many immigrants __________(forbid) to live on in that country because of war.
15.Follow your doctor’s advice, ________you will get better soon.
16.When the ice is heated above ________(freeze) point, it changes into liquid.
17.The government must set out ________(find) solutions to solve the problems.
18.I can’t bear young people _________(cast) away their youth.
19.Our school invited five foreign teachers, three of_________ are from America.
20.These questions are so difficult ________no one can answer.
高二英语完成句子困难题查看答案及解析
________ some teenagers don’t realize is ________ difficult life can be after they get
addicted to drugs.
A. That, how B. That, what
C. What, what a D. What, how
高二英语单项填空简单题查看答案及解析
It is difficult to ____ one twin from the other. They almost don’t ____ from each other.
A.differ, distinguish | B.distinguish, differ |
C.distinguish, different | D.tell, different |
高二英语单项填空简单题查看答案及解析
Talking to children about disasters
Natural disasters are terrible events. They are difficult for adults and children. But adults should not be afraid to talk to children about natural disasters.1.But talking can help children feel safer and less afraid of the future. Here are five things adults can do when children show fear of natural disasters.
First, adults should be willing to talk with children. When children are allowed to talk about their fears, they feel safer. Sometimes, the best thing an adult can do is just listen. 2.
Second,3.When answering their questions, it is best to give short, honest answers. If you do not know the answer, you can be honest and say that you do not know.
Third, it is important to wait until a child is ready to talk about a natural disaster. Adults should not force children to talk.
Fourth, help children feel safe.4.One way is very simple: adults can tell frightened children that they love them. It is also important for children to do the same things they do every day. Simple things like going to school and eating dinner can help children feel normal.
Fifth, use activities to help children communicate their fears. Heshani was 13 when the Indian Ocean tsunami (海啸) ruined her house in SriLanka. One year later, she was still living under the shadow (阴影) of the natural disaster. She did not like to visit her ruined house. And she did not want to talk about the problems her family had. However, she loved to write. 5.Writing poems was a way for her to share her fears since she did not like to talk about them.
A. let children ask questions.
B. There are many ways to do this.
C. Talking cannot stop natural disasters from happening.
D. learning is of great importance to adults.
E. We should feel safe first.
F. Whatever the fear is, it is important to listen and be patient with the child.
G. And she often shared her feelings about the tsunami in her poems.
高二英语七选五简单题查看答案及解析