As we all know, water ______ hydrogen and oxygen.
A．makes up B．is consisted of C．consists of D．consists in
高二英语单项填空中等难度题
As we all know, water ______ hydrogen and oxygen.
A．makes up B．is consisted of C．consists of D．consists in
高二英语单项填空中等难度题查看答案及解析
We all know that forests-especially rainforests-absorb carbon dioxide and produce the oxygen that all living things depend on. It’s no wonder that they have been named the lungs of the planet. Today, after the big fires in the Amazon, Alaska, Greenland, and even Siberia, it’s very clear that we need to grow a forest that is fireproof. That’s not an impossible dream. We can grow seaweed forests that are fireproof because they are underwater.
Seaweed can store carbon and help reduce the influence of global warming. Now, seaweed is being farmed in small ocean farms to be used for food, medicines, and beauty products. If seaweed can be grown on a large scale(大规模地), it could help to fight against global warming.
“Seaweed is finally having its moment in the spotlight,” said Halley Froehlich, a scientist at the University of California. She is the lead author of a new study published in Current Biology. The study shows that large-scale seaweed farming could be used to cancel out land-based carbon emissions and it mapped the areas of the oceans where seaweed could be grown.
Now, only 3.8 percent of the US waters off the coast of California are being used to grow seaweed but that is just 0.065 of the ocean that can be farmed. In fact, 48 square kilometers of the world’s oceans can be used for seaweed farming.
For seaweed farms to be part of the global solution, they will have to be much larger. To create underwater forests, seaweed would have to be grown, harvested and then sunk into the deep ocean so that the trapped carbon could be buried for years to come.
While it sounds like a good plan on paper, “The technology doesn’t yet exist” to keep seaweed in the deep ocean, said Froehlich. “Hopefully this paper encourages conversation among engineers and economists about what it would take for the actual tools to be put in place.”
1.What makes people put forward the idea of growing seaweed forests?
A.The burning of forests.
B.Seaweed’s economic and medical value.
C.Uncontrollable carbon dioxide emissions.
D.Their long-lasting dream of underwater exploration.
2.Why can seaweed be used to fight against global warming?
A.It doesn’t burn. B.It doesn’t pollute.
C.It can take in carbon. D.It can break down plastics.
3.What does the underlined part “having its moment in the spotlight”in Paragraph 4 probably mean?
A.Breaking silence. B.Taking a bad turn.
C.Drawing people’s attention. D.Making room for other products.
4.What does Frochlich say about the idea of growing seaweed forests in the last paragraph?
A.It has a long way to go. B.It has been put into practice.
C.It needs lots of money to carry out. D.It needs enough evidence to support.
高二英语阅读理解中等难度题查看答案及解析
Everybody knows the importance of drinking enough water.As we all know, drinking water benefits your skin, muscles and organs.1.
The major reason for that is related to human biological needs.When you're a baby, you're 75 percent water.Then, as the years get higher, you get drier.2. It helps you lose weight, according to a study from the University of Birmingham.
The researchers found that drinking 500 ml of water thirty minutes before a meal helped participants lose 10 more pounds than those who did not.3. All participants were advised to improve their diet and physical activity levels.84 overweight adults were involved.Among them 41 were told to “preload” with water, while 43 were told to control their water intake before eating.After 12 weeks, the participants instructed to “preload” with water lost 2.87 pounds more than those in the control group on average.In addition, the participants preloading with water before each of their three main meals every day lost 9.48 pounds over the 12 weeks.4.
Dr.Helen Parretti, a lecturer at the University of Birmingham, had this to say of the study: 5.Just drinking 500 ml of water, three times a day, before your main meals may help reduce your weight...and this could be an easy way for weight loss. Furthermore, it can be significant for an individual to lose extra weight, making a potential contribution to public health.
A.Another reason to drink water is right here.
B.The study began with a weight management consultation.
C.The beauty of these findings is that losing weight is simple.
D.But not everyone can get access to tap water in some areas.
E.It also helps prevent certain diseases and improve your mood.
F.In contrast, those preloading once a day or never, lost just 1.76 pounds.
G.So kids should drink more water instead of coke to keep healthy.
高二英语七选五中等难度题查看答案及解析
We all know that water is tasteless. But it happens from time to time: you pick up the bottle of water you didn’t finish yesterday, and it tastes strange. Most often, you tend to drop the bottle in the trash bin, believing that the water has gone bad. But is it true?
According to Time, of course not, taste has little to do with quality of water.
According to Time, when water is exposed to the air for 12 hours, carbon dioxide interacts with the H2O in the water, and the pH value lowers slightly. As a result, the water has a different taste.
“But it’s most likely safe to drink,” Norwegian expert Truls Krogh told Science Nordic. “If the water is covered and of good quality to start with, in principle it can last a thousand years. That’s because when water is fresh, it contains little organic matter. As long as water is held in clean glasses or bottles, no pollutants will enter it to harm our health.”
People in countries like the US, the UK and Australia usually drink tap water. According to Time, if tap water is drunk within six months, the chlorine (氯气) in the water will be enough to kill any bacteria and keep it safe to drink.
However, there are also some exceptions. If you accidentally put your fingers into water or store water in unclean containers day after day, microorganism (微生物) will enter the water.
With the help of surrounding temperature, and sunlight streaming through windows, these microorganisms multiply quickly. Sooner or later, the water will be in the charge of the unfriendly bacteria. And if you drink the water too often, then you’re more likely to be ill.
And what about water in plastic bottles? Heat and plastic are a bad combination, US researcher Kellogg Schwab stresses. When plastic bottles are used at high temperatures, they produce a chemical called BPA. BPA is something that affects hormones (荷尔蒙) and research has tentatively linked it to “several health damage, including heart disease and cancer”, Time reported.
Schwab suggests replacing disposable (一次性的) plastic bottles with the refillable containers made of metal or glass to deal with BPA.
1.The purpose of the first paragraph is to ________________.
A. show an example B. draw a conclusion
C. analyze a phenomenon D. introduce a topic
2.Which of the following may Truls Krogh agree?
A. If the water tastes different, we shouldn’t drink it.
B. The water held in a clean container is likely safe to drink.
C. Although kept fresh, water may still have much organic matter.
D. Covered water can last for a thousand years.
3.What can we infer from the passage?
A. BPA does little harm to our health.
B. Tap water is always safe to drink.
C. Microorganisms are easy to produce in the heat.
D. Disposable plastic bottles have been banned already.
4.What can be the best title of the passage?
A. Why Water is Tasteless B. How to Get Clean Water
C. Does Water Really Go Bad? D. Learn to Protect Water
高二英语阅读理解困难题查看答案及解析
As we all know, people often make a living by making the most of local surroundings. A small village by the sea depended on ______ to survive. Each year the villagers had to go farther and farther from shore to catch enough fish to ______ the population.
But as the villagers went farther away, they ______ a problem. Their usual ______ was to put the fish they caught in big tanks to keep them ______ until they returned home. But the fish grew inactive in the tanks, and many ______ before the boat could reach shore again.
After much ______, one villager ______ a solution. On their next fishing trip, they caught a ______ shark and placed it in the tank along with the fish. The shark ate only a few fish, but the rest swam ______ around the tank trying to keep away from the shark—and made it to shore fresh and healthy for the villages.
Sometimes a little fear is what we need to stay active and ______. People usually lose ______ and focus when everything goes smoothly and ______ best when they have a little anxiety or fear.
A little fear can be ______. Fear can hold a lot of people back and stop them from living life to the fullest. I understand that feeling of being afraid.______ there is only one thing worse than ______, and that is being afraid to begin. There are no hopeless situations; there are only people who have grown ______ about them.
Dale Carnegie once said, “Inaction ______ to doubt and fear. Action breeds ______ and courage. If you want to ______ fear, do not sit home and think about it. Go out and get busy.”
1.A. hunting B. farming C. fishing D. planting
2.A. expand B. protect C. feed D. attract
3.A. designed B. encountered C. explained D. answered
4.A. route B. idea C. practice D. reflection
5.A. nutritious B. precious C. fresh D. unique
6.A. fled B. died C. jumped D. recovered
7.A. thought B. fight C. quarrel D. consultation
8.A. looked for B. long for C. hit upon D. make up
9.A. fierce B. small C. big D. rare
10.A. quietly B. slowly C. happily D. wildly
11.A. strong B. cheerful C. alive D. normal
12.A. concentration B. strength C. decision D. consideration
13.A. create B. experiment C. perform D. respond
14.A. horrible B. desperate C. healthy D. ridiculous
15.A. Lastly B. Therefore C. Instead D. However
16.A. starting B. joining C. quitting D. continuing
17.A. sensitive B. hopeless C. hopeful D. optimistic
18.A. leads B. sticks C. objects D. appeals
19.A. confusion B. disappointment C. cooperation D. confidence
20.A. acquire B. limit C. advocate D. conquer
高二英语阅读理解中等难度题查看答案及解析
_____ is known to all that oil and water don’t mix up.
| A．It | B．What | C．Which | D．As |
高二英语单项填空简单题查看答案及解析
We all know the truth _____ there are air, water and sunlight there are living things.
A. where B. wherever C. that D. that wherever
高二英语单项填空中等难度题查看答案及解析
As we all know, looking away from people or yawning will, _______, make us appear to be uninterested.
A. for one thing B. by all means
C. in most cases D. at one time
高二英语单项填空简单题查看答案及解析
We all know the truth ________ there are air, water and sunlight there are living things．
A．where B．wherever C．that D．that wherever
高二英语单项填空简单题查看答案及解析
We have all heard of giant pandas, and know that they are endangered. When one has babies, it makes national news_______, and pictures of their babies are_____ circulated. But it now seems that the giant panda is not ______ of itself.
The lovely animals have ______ a classic test of self-awareness. They cannot ____ themselves in the mirror. Researchers use the mirror recognition test to ____ whether children or animals have a ______ of self-awareness.
In the test, an animal is presented ______ a mirror. Researchers then watch to see ______ it notices a mark on its face, which is only_______ in the mirror. If the animal notices the mark, it often ______ it. Human children often pass the test when they are only two years old.
Many other animals have passed the mirror test, including monkeys, Asian elephants and even pigeons. But when researchers tested pandas, ______ of them did the same thing as those animals did. ______, each panda behaved as if their_____ in the mirror was another panda altogether. They acted as if they were_______ by what they saw in the mirror, scratching their feet and walking_______.
The________of this research will help design better areas for animals in captivity (圈养). For example, one-directional glass sometimes used in the areas may ____ pandas to feel stressed when they see their own image in the ______. That’s because they might believe it to be another panda,________themselves.
1.A. papers B. covers C. headlines D. pages
2.A. widely B. popularly C. especially D. completely
3.A. shy B. fond C. conscious D. confident
4.A. failed B. ignored C. faced D. conducted
5.A. observe B. discover C. recognize D. understand
6.A. believe in B. find out C. pick out D. take in
7.A. sense B. question C. opinion D. thought
8.A. for B. with C. in D. before
9.A. how B. when C. why D. whether
10.A. touchable B. seeable C. sensible D. possible
11.A. dismisses B. admits C. feels D. moves
12.A. all B. most C. one D. none
13.A. Thus B. However C. Instead D. Still
14.A. reaction B. reflection C. operation D. imagination
15.A. trapped B. amazed C. threatened D. teased
16.A. backwards B. alone C. forwards D. along
17.A. failure B. outcome C. success D. review
18.A. cause B. prepare C. accelerate D. urge
19.A. eyes B. cages C. zoo D. glass
20.A. other than B. regardless of C. because of D. rather than
高二英语完形填空中等难度题查看答案及解析