Energy drinks are not allowed _______ in Australia but are brought in from New Zealand.
A.to make | B.to be made | C.to have been made | D.to be making |
高三英语单项填空中等难度题
Energy drinks are not allowed _______ in Australia but are brought in from New Zealand.
A.to make | B.to be made | C.to have been made | D.to be making |
高三英语单项填空中等难度题查看答案及解析
It’s reported that energy drinks are not allowed ___ in Australia.
A. to be making B. to be made C. to make D. to have been made
高三英语单项填空困难题查看答案及解析
It’s reported that energy drinks are not allowed ___ in Australia.
A. to be making B. to be made C. to make D. to have been made
高三英语单项填空中等难度题查看答案及解析
阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。
Are energy drinks safe? In spite of the dangers 1. (know) to us all, the market for energy drinks is booming. The Global Energy Drink market 2. (expect) to teach $72 billion by 2024. This is great news for energy drink producers, 3. what are consumers really getting when they buy these drinks?
Energy drinks can cause dehydration (脱水). The main source of energy in most energy products is caffeine, 4.increases urine (尿) production. People shouldn’t consume more than 400 mg of caffeine per day, but energy drink producers are not required by draw 5. (list) the amount of caffeine their products contain.
Energy drinks can increase heart rate. Caffeine contributes 6. a heart rate risk, says nutritionist Lisa Cohn, who found that energy drink abuse among teens 7. (cause) increased risk of heart attack, especially in those with potential heart conditions
Energy drinks can damage 8. (tooth) Most energy products contain large amounts of citric acid (柠檬酸), which is particularly 9. (harm) to enamel (牙釉质). In fact, the 10. (lose) of enamel after exposure to energy drinks is more than twice higher than after exposure to sports drinks.
高三英语语法填空中等难度题查看答案及解析
Food and fruit are forbidden in the library, ______ you are allowed to have drinks and sweets with you.
A. and B. but C. so D. or
高三英语单项填空中等难度题查看答案及解析
It's not always easy to run an energy efficient house. But there are some simple things anyone can do.
Go LED with your lighting.
There are sevenal benefis to switching to energy efficient light bulbs. One of them is saving money- though the LED bulbs might cost more than traditional bulbs, the average saving on LED bulbs is $ 75a year._ 1.LED bulbs can last years or even decades.
Don't run your air conditioner constantly
As the weather starts to warm, you might be thinking about the right time to turrn on your air conditioner. _ 2.Air conditioner units are among the most energy-consuming appliances in your home. Using electrical fans instead of your air conditioner is much more efficient and it's a big money saver, too.
3.
On those days when you treat a large crowd and are low on time,don't beat yourself up if you have to use disposable(一次性的) dishware. This method reduces your water usage and saves energy. And as a bonus, if your city offers roadside recycling, your paper plates may qualify.
Update your insulation(隔热)
All that work you're doing to save energy in your home could go to waste if it's not properly insulated. If you can't insulate the whole house, pay special attention to the roof: it reduces air flow from outide. By updating your insulation,you're saving money.4.
Take showers instead of baths
A full bathtub requires about 70 gallons of waler.5.Showers are quite dfferent---taking a five-minute shower uses only 10 to 25 gallons!
A.But do you really have to?
B.You should use your air conditioner smartly.
C.Tum off water when not using it.
D.Plus, you needn't change them frequenly.
E.Don't feel guilty about using paper plates.
F.And it's also easier to control your home temperature.
G.Even if you don't fill it to the top, it still uses much more water.
高三英语七选五中等难度题查看答案及解析
Every animal sleeps, but the reason for this has remained foggy. When lab rats are not allowed to sleep, they die within a month.1.
One idea is that sleep helps us strengthen new memories. 2. We know that, while awake, fresh memories are recorded by reinforcing (加强) connections between brain cells, but the memory processes that take place while we sleep have been unclear.
Support is growing for a theory that sleep evolved so that connections between neurons (神经元) in the brain can be weakened overnight, making room for fresh memories to form the next day.3.
Now we have the most direct evidence yet that he is right.4. The synapses in the mice taken at the end of a period of sleep were 18 per cent smaller than those taken before sleep, showing that the connections between neurons weaken while sleeping.
If Tononi’s theory is right, it would explain why, when we miss a night’s, we find it harder the next day to concentrate and learn new information — our brains may have smaller room for new experiences.
Their research also suggests how we may build lasting memories over time even though the synapses become thinner. The team discovered that some synapses seem to be protected and stayed the same size. 5. “You keep what matters,” Tononi says.
A. We should also try to sleep well the night before.
B. It’s as if the brain is preserving its most important memories.
C. That’s why students do better in tests if they get a chance to sleep after learning.
D. Similarly, when people go for a few days without sleeping, they get sick.
E. The processes take place to stop our brains becoming loaded with memories.
F. Tononi’s team measured the size of these connections, or synapses, in the brains of 12 mice.
G. “Sleep is the price we pay for learning,” says Giulio Tononi, who developed the idea.
高三英语七选五困难题查看答案及解析
People are advised not to drive after drinking, but __ seems not to help a lot.
A.it | B.which | C.they | D.one |
高三英语单项填空中等难度题查看答案及解析
C
Could the solution to world future energy needs lie in the ocean? It’s possible.
We are not talking about oil, but another potential untapped energy resource called “methane hydrates”.
Methane hydrates are hard, ice-like white solids that form naturally in deposits (沉积物) on ocean floors. They arecomposed of water and highly concentrated methane produced by the microorganisms living in the deposits.
The remarkable thing is that you can hold a flame to a piece of methane hydrate and it will catch on fire. It’s been called “burning ice.”
Methane hydrates are spread around the world. These deposits may in the future become a very important fuel resource. One researcher calculated that a small area off the Southeastern coast of America may contain methane hydrates equal to 30 times the annual U.S. consumption of natural gas.
Right now there are very significant technical and financial challenges facing us before we could exploit this as a resource. Scientists around the world are studying these challenges. One big issue is how to get these methane hydrates off the ocean floor, causing undersea landslides and tidal waves.
Another issue is how to handle the matter after it is brought up. It’s also unclear whether it would make more sense to “mine” solid hydrates or tap the gases found with them. And many deposits may occur in low concentrations with no commercial potential.
Japan, which has no oil supplies of its own, has thrown itself into burning ice research because it has deposits off its shores which could make Japan less dependent on foreign suppliers of oil.
The U.S. Department of Energy and Congress are also supporting research. However, the US administration’s energy policy is focused on traditional fossil (化石) fuels. And at least for now, developing burning ice into a fuel source isn’t high on the energy industry’s list. But if natural gas continues to rise in price, exploiting burning ice might become economically practical.
59. What’s the meaning of the underlined word in Paragraph Two?
A. not existed B. Unseen C. available but not used D. unreal
60. What can you learn from the text?
A. Burning ice has been used in some countries.
B. Applying burning ice tops the energy list in America.
C. Burning ice exists in few countries.
D. There are still some problems in developing the burning ice
61. Why has Japan already begun to develop the burning ice?
A. It is a developed country. B. They want to help other countries.
C. It lacks oil supplies of its own. D. America asked Japan to do so.
62. Which one is the best title of the text?
A. World Energy Shortage B. Burning Ice Holds Hope as Fuel Source
C. Methane Hydrates D. Methane Hydrates Spread around the World
高三英语阅读理解简单题查看答案及解析
We don’t allow ________ in the lecture hall, so you are not allowed ________ here.
A. smoking...smoking B. to smoke...to smoke
C. smoking...to smoke D. to smoke...smoking
高三英语单项填空简单题查看答案及解析