33. Nowadays, use____of certain waste materia...

33. Nowadays, use____of certain waste materials to protect the environment.

高一英语单项填空简单题查看答案及解析

Do you know the waste material can be made use ________ this kind of the toy?

A. of producing     B. to produce     C. to producing    D. of to produce

高一英语单项填空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 US.

For some parents, the Internet can seem like a jungle, filled with danger for their children. But jungles contain wonders as well as danger. With good guides, some education, and a few precautions(预防 ), the wilds of the Internet can be safely navigated. “Kids have to be on-line. If we tell our kids they can’t be allowed to surf the Internet, we’re cutting them off from their future,” said an expert.

Most kids have started to use search engines. 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. There are search engines designed just for kids. A certain software contains only sites that have been selected as safe. The most popular way would be to use what is known as a “content screener”. 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. Another way is that mum or dad is nearby when the child is surfing the Internet.

A few other tips:

—Do not 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.

―Tell your child not to give on-line strangers personal information, especially like address and phone number.

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.

1.What is the best way to protect children from improper material?

2.Which of the following statements is true according to the passage?

3.According to the passage, we can infer that ____.

4.What does the passage tell us most?

高一英语阅读理解中等难度题查看答案及解析

This kind of material can be used to _____plastics.

高一英语单项填空简单题查看答案及解析

They began to think about what use could be ________ such materials.

C. made of         D. made out

高一英语单项填空中等难度题查看答案及解析

We take showers and use the toilet every day to get rid of bodily waste. Our brains also need to take a bath every day. How can they do it?

A 2013 study found the answer. Researchers at the US University of Rochester studied the brains of mice and discovered that they cleaned themselves while the mice slept. A kind of fluid (液体) in the brain, called cerebral spinal fluid (CSF, 脑脊液), was found to increase dramatically (显著地) during sleep, washing away waste proteins that had been building up between brain cells in waking hours.

“This study shows that the brain has different functional states when asleep and when awake,” Maiken Nedergaard, the lead researcher, told NBC News. It also explains why we can’t seem to think clearly after a sleepless night while a good night’s sleep leaves us feeling sharp and refreshed.

Now a new study, published on Oct. 31 in Science, digs a little deeper into our brains’ self-cleaning procedure. Instead of mice, this time humans were the test subjects.

Researchers at Boston University, US, monitored the brainwaves of 13 healthy adults who were sleeping, using accelerated FMRI (核磁共振成像), which is capable of recording faster changes inside the brain than a regular FMRI machine. They found that every 20 seconds, blood flowed out of the brain, making room for a large amount of CSF to come in and “clean”. This cycle coincided with (与....一致) the rhythm of the brain’s slow waves—an electrical activity that happens when we’re in a deep sleep.

It’s still unknown how these brain activities are connected. But the mere fact that they are connected is exciting enough, since it allows researchers to piece together (拼凑出) possible new explanations for misunderstood diseases.

For example, slow-wave sleep has been proven to play a role in strengthening our memories. This may explain why people with Alzheimer (阿尔茨海默病) often have fewer and weaker slow brainwaves. Based on this new study, there could be one more explanation for diseased brains: They are not clean.

Nedergaard, leader of the 2013 study, is also excited about the new findings. “Maybe the most important take-home message is that sleep is a serious thing,” she told Scientific American. “You really need to sleep to keep a healthy brain because it links electrical activities to a practical ‘housekeeping’ function.”

1.What did the researchers find when they studied the brains of mice?

A.CSF in their brains decreased when the mice slept.

B.More waste proteins were produced in their brains during sleep.

C.CSF carried away waste proteins in their brains during sleep.

D.The more CSF was in their brains, the fewer proteins were there.

2.What did the researchers discover when they monitored human brainwaves?

A.It took 20 seconds for CSF to clean brains.

B.Brains were “cleaned” when blood flowed out.

C.The rhythm of the brain was slower than that of CSF.

D.The brains worked more slowly when asleep.

3.What are the last three paragraphs mainly about?

A.The significance of the research.

B.The features of slow-wave sleep.

C.The importance of having a good sleep.

D.The connections between these brain activities.

高一英语阅读理解困难题查看答案及解析

Waste heat from one of the London Underground’s lines will be used to warm over a thousand homes in the UK capital this winter. The warm air will be channeled from the Northern Line to support the London Borough of Islington’s district heating.

Named Bunhill 2,the heat network is a joint project between Islington Council, Transport for London and engineering firm Ramboll and is considered as the first of its kind in Europe. The council hopes the system will make London more self-sufficient (自给自足的) in energy, cut carbon emissions and reduce heating bills for people.Meanwhile, tube passengers on the underground can also expect cooler air.

District heating, also known as heat networks, is the supply of heat and hot water from a central source to a group of buildings. The Bunhill 2 district heating system is the second phase (阶段) of Islington Council’s Bunhill Heat and Power scheme-a heat network in Islington that was established in 2013 to warm approximately 700 homes.

The network currently channels heat created in the Bunhill Energy Centre power station into local council housing, schools and a leisure centre. Bunhill 2 will extend this network to more community buildings and a further 450 homes.

The central source of the Bunhill 2 heat network is a ventilation shaft (通风井)-a passage that is used to expel waste heat-in the abandoned (废弃的) City Road station. A heat pump designed by Ramboll will capture this extra heat from the ventilation shaft, before it is warmed to approximately 70 degrees Celsius. This will then be transferred (转移) into Islington’s heat network to supply heat and hot water to buildings.

According to the Greater London Authority, there is enough heat wasted in London to meet 38 per cent of the city’s heating demand. The expansion of district heating networks like Bunhill 2 could see this increase to 63 per cent by 2050.

“We believe that the use of large-scale heat in this way connected to urban district heating systems will play a major part in the Uk’s heating energy demand,” explained Lucy Padfield, director of District Heating at Ramboll.

“The use of heat pumps taking advantage of industrial waste heat sources is more carbon efficient than gas-fired combined heat and power, the usual source of heat for district energy schemes,” she continued. “I am convinced that with the increasing use of renewable power sources, large-scale heat pumps connected to district heating systems will play a major role in the future heating of cities in the UK.”

1.What can we learn about Bunhill 2 in London?

A.It is inspired by other cities in Europe.

B.It will be beneficial to London’s environment.

C.It can satisfy the whole city’s need for energy.

D.It is aimed at cooling the London Underground.

2.What does the underlined word “expel” in Paragraph 5 most probably mean?

A.Rely on B.Deal with.

C.Break down. D.Drive out

3.What is Lucy Padfield’s attitude towards Bunhill 2?

A.Concerned. B.Confident

C.Amazed D.Disapproving

4.What is the text mainly about?

A.London’s special way to protect the environment.

B.The development of London’s district heating network.

C.Using waste heat from the underground to warm homes.

D.Ways to deal with the London Underground’s waste heat.

高一英语阅读理解中等难度题查看答案及解析

（1）1.(get) rid of garbage problems, the city will load huge spaceships with waste materials 2. send them towards the sun, 3.(prevent) landfill and environmental problems.

All cars will be powered by electricity, solar energy or wind, and 4.will be possible to change the color of cars 5. the flick of a switch.

（2）Li Hua and Wang Hai are two students of Senior Three. 6.of them work hard but they have various learning methods.

Li Hua listens to her teachers7.(attentive) and asks her teacher　 8.help as soon as possible if she has some problems. Because of this, she spends less time 9.(do) her homework, so it is10.(certainly) that she can keep energetic in the day. However, Wang Hai has quite a11. (difference) way of learning 12.(compare) to Li Hua. He likes to sit up late at night doing his homework, so he often feels sleepy in class. As a result, he misses lots of key points, 13.makes it difficult for him 14.(concentrate) on what he is doing.

In my opinion, Li Hua learns more effectively in class and has more free time to enjoy herself. So I prefer15.(she) learning method.

高一英语短文填空中等难度题查看答案及解析

The leader of the factory told us that very little ___ was made of the waste material in the past.

A. cost            B. value              C. use              D. matter

高一英语单项填空中等难度题查看答案及解析

The leader of the factory told us that very little ___was made of the waste material in the past.

A.cost            B.value               C.use              D.matter

高一英语单项填空中等难度题查看答案及解析