The water _____ cool when I jumped into the p...

The water___cool when I jumped into the pool for morning exercise。

A．was felt           B．felt               C．is felt             D．feels

高三英语单项填空中等难度题查看答案及解析

The water ________ cool when I jumped into the pool for morning exercise.

A．was felt　 B．is felt　 C．felt　 D．feels

高三英语单项填空中等难度题查看答案及解析

The water________cool when I jumped into the pool for morning exercise.

A. was felt               B. is felt                  C. felt                     D. feels

高三英语单项填空中等难度题查看答案及解析

The water _____ cool when I jumped into the pool for morning exercise.

A.was felt B.is felt C.felt D.feels

高三英语单项填空中等难度题查看答案及解析

When life gives you pineapples—and hundreds of millions of tons of pineapple waste—what do you do? Engineers in Singapore and Vietnam decided to tum all the waste into something useful—the heat barrier for their pineapple juice. Not only does their new material keep drinks cool better than many commercial coolers, but it could also offer a final resting place for the world’s pineapple waste.

To find a use for those leftovers, the researchers mixed pineapple fibers, which they cut up in an electric device, with a sticky agent as a solvent. They then treated the mix with sound waves at frequencies greater than 20 kHz and heated it in an oven at 80℃ for 2 hours. The suspension that formed was then cooled before being freeze-dried.

The result was a pale yellow aerogel (气凝胶) that is lightweight, flexible, and more than 96% porous (多孔的)—qualities that make it an ideal material against both heat and sound.

When the researchers wrapped a sheet of the pineapple aerogel around a military-style canteen bottle, they found that the aerogel could provide three times the heat exchange reduction of commercially available alternatives—they reported this month in Materials Chemistry and Physics. The gel-wrapped bottle kept -3℃ water cooled below 0℃ for 6 hours and liquid heated to 90℃ above 40℃ for 2.5 hours. What’s more, the pineapple gel also acted as a sound barrier; in another test, the gel did a better job of preventing noise from getting in or out than Basmel, a popular kind of sound barrier.

The findings provide a new, eco-friendly approach to recycling agricultural cast-offs—and a good excuse to get a better electric device for your kitchen.

1.Why do engineers come up with the idea of the heat barrier?

A.To lower the cost of heat barriers. B.To make good use of pineapple waste.

C.To find a better cooler for pineapple juice. D.To turn pineapples into something more useful.

2.What is the last step of making the pineapple aerogel?

A.Freeze-drying the suspension. B.Cooling the formed suspension.

C.Cutting up the pineapple leftovers. D.Treating the mix with sound waves.

3.What can we learn about the pineapple aerogel from paragraph 4?

A.It kept the liquid heated to 130℃ for about 2.5 hours.

B.It kept the water cooled below -3℃ for nearly 6 hours.

C.It could be three times as effective as other heat barriers.

D.It did a better job as a sound barrier than as a heat barrier.

4.What is the best title for the text?

A.A Better Way to Keep Drinks Cool. B.An Alternative Way to Recycle Waste.

C.Pineapple Waste, a Wonderful Drink Cooler. D.Pineapples, One of the Most Common Fruits.

高三英语阅读选择中等难度题查看答案及解析

Our bodies are wonderfully skillful at keeping balance．When the temperature jumps, we sweat to cool down．When our blood pressure falls, our hearts can do something．As it turns out, though, our natural state is always changing．Researchers are finding that everything from blood pressure to brain function changes regularly with the cycles of sun, moon and seasons．And their insights （洞察力） are getting new ways for keeping away such common killers as heart disease and cancer．Only one doctor in 20 has a good knowledge of the scientific use of time in medicine．But according to a new American Medical Association, three out of four are eager to change that．“The field is exploding,” says Michael Smolensky．“Doctors used to look at us like, What spaceship did you get off ? Now they're thirsty to know more．”

In medical school, most doctors learn that people with chronic  conditions should take their medicine regularly．“It’s a terrible way to treat disease,” says Dr Richard Martin．For example, asthmatics （气喘患者） are most likely to suffer during the night．Yet most patients try to keep a constant level of medicine in their blood day and night, whether by breathing in on an inhaler （吸入器） four times a day or taking a pill each morning and evening．In recent studies, researchers have found that a large mid afternoon dose of a bronchodilator （支气管扩张剂） can be as safe as several small doses, and better for preventing nighttime attacks．

If the night belongs to asthma, the dawn belongs to high blood pressure and heart disease．Heart attacks are twice as common at 9 a．m．as at 11 p．m．Part of the reason is that our blood pressure falls at night, then rises as we start to work for the day．“Doctors know that,” says Dr．Henry Black of Chicago's Medical Center, “but until now, we haven't been able to do anything about it．” Most blood - pressure drugs provide 18 to 20 hours of relief （减缓）．But because they’re taken in the morning, they're least effective when most needed．“You take your pill at 7 and it's working by 9,” says Dr．William White of the University of Connecticut Health Center “But by that time you've gone through the worst four hours of the day with no protection．” Bedtime medicine would prevent high blood pressure, but it would also push blood pressure to dangerously low levels during the night．

1.Researchers are finding that _________ ．

A．heart disease and cancer are the most common killers of human beings

B．only blood pressure and brain function are decided by cycles of sun, moon and seasons

C．the functions of human bodies have much to do with nature

D．any change in human bodies goes with changes in the surroundings

2.According to the author, it is best for asthmatics to take their medicine _________ ．

A．at certain time

B．each morning and evening

C．when the disease occurs

D．at midafternoon

3.Which of the following statements is NOT true?

A．Doctors know more about illnesses than before．

B．Doctors in the U．S．used to be thirsty to know more about the new medical field．

C．The researchers' insights are providing new methods to prevent common killers．

D．The correct use of time in medicine attracts more attention in medical circle in the U．S．A．

4.The suggested title for this passage might be _________．

A．Medicine Is Everything               B．Treatment Is Everything

C．Timing Is Everything                 D．Prevention Is Everything

高三英语阅读理解中等难度题查看答案及解析

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多右两处每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：I. 每处错误及其修改均仅限一词；

2. 只允许修改10处，多者（从第11处起）不计分。

When I was young, I dreamed of becoming many things. Sometimes, I wished I was a astronaut going up into space, finding new planets but jumping around in a cool space suit. Other times, I imagined that being a cowboy in the Wild West, wearing stylish cowboy boots. On other occasions, I pretended to being a famous footballer, using my skills score lots of goals for my favourite team. Growing up with siblings also helps, combining our ideas and putting our thought into action. I was even able to create entirely plots in my head, using nothing more than my brain.

Looked back, I realize the imagination is a wonderful thing in your life.

高三英语短文改错中等难度题查看答案及解析

An American brother and sister have survived a 14-hour swim to safety in the Caribbean after the fishing boat they had rented sank off the north coast of St Lucia.

Dan Susk, 30-year-old IT professional from San Francisco, said he had been fishing in rough seas with help from his sister, Kate Suski, a 39-year-old architect, when the ship began to sink on 21April. Water flooded the engine room. The captain threw life jackets to the Suski and said, “Jump out! Jump out!” The Suski obeyed and jumped into the water with the captain and the first mate (大副). Less than five minutes later the boat sank. They were at least eight mile was telling us to stay together, and that help was on its way and that we needed to wait, Kate Suski said. After an hour, when no help came, the Suski decided to swim for it and lost sight of the captain and the first mate.

A helicopter appeared in the distance but no one spotted them. Several hours went by, and the sun began to set. “There’s this very real understanding that the situation is dire,” Kate Suski said both considered the possible ways we might die. Would we drown? Be eaten by a shark? Would our legs give out and make it impossible to swim?

They swam for 12 to 14 hours, talking as they pushed and trembled their way through the ocean. When in the moonlight they finally came within about 10 meters of land they realized that they were looking at steep rocky cliffs and would be beaten to death against them if they tried to approach any closer. They swam until they noticed sand nearby around midnight and dragged themselves ashore. Later, the Suski were treated in hospital. They learned that the captain and the first mate were rescued after spending nearly 23 hours in the water.

1.How many people were there on the fishing boat before it sank?

A.5. B.4.

C.3. D.2

2.What does the underlined word "dire" in Paragraph 3 mean?

A.Awkward B.Serious

C.Perfect. D.Different

3.What do we know about the Suskis?

A.They were rescued by a helicopter.

B.They survived 23 hours in the water.

C.They swam over eight miles to the shore

D.They got back on land as soon as they saw it.

4.Which of the following can best describe the Suskis?

A.Brave and calm. B.Strong and sensitive

C.Optimistic and generous. D.Faithful and curious

高三英语阅读选择简单题查看答案及解析

_____it is to jump into the water in hot summer!

高三英语单项填空中等难度题查看答案及解析

Retired nurse Sue Collins was just beginning the second length of her local pool when her morning swim suddenly became anything but a pleasure.

Two months ago Sue, 69, who has never suffered from asthma or any other breathing problem in the past, suddenly found herself hard for breath.

“I felt as if my throat and oesophagus (食道) were closing up,” says Sue.

Sue is convinced the problem is related to the indoor swimming baths. “I spend half the year in Turkey and swim every day outside in a pool or the sea there and never have this problem,” she says.

She may be right, because although a trip to the pool is the perfect exercise for many, the chlorine (氯气) used to keep the water free from germs can lead to problems.

But in most cases it’s not the chlorine that causes problems, but the by-products formed when chlorine interacts with other substances — and this is mostly due to people not showering before they enter the pool.

“This then poisons the water for them and for others,” says Dr. Hull. “The chlorine interacts with sweat and urine(尿素) on the skin and forms by-products called chloramines that float above the surface as a gaseous solution that can be inhaled in.”

Chloramines are heavier than air so hang over the water where they are easily breathed in. Some believe they may cause lung disorders. A Swedish study in 2013 examining the health of 146 workers at 46 indoor pools found that 17 per cent had airway trouble at work — but no problems at home.

As Dr. Hull says: ‘People need to remember that showering isn’t just for them. It is for the greater good.’

1.Where did Sue suddenly suffer from asthma?

A. In an outdoor swimming pool.　　 B. In the sea.

C. In an indoor swimming pool.　　 D. At home.

2.Why should we put chlorine into the water of the pool?

A. To keep the water warm.　　 B. To kill the germs in the water.

C. To make the people easy to breathe.　　 D. To stop the possibility of asthma.

3.Taking a shower before swimming in the pool is to ________.

A. stop the interaction between the chlorine and sweat and urine on the skin

B. make the swimmer feel comfortable

C. obey the rule of the pool

D. stop people from breathing in the chlorine

4.What’s the purpose of the passage?

A. To show how to avoid asthma.

B. To explain chloramines’s usage.

C. To help people cure asthma.

D. To tell people why to take a shower before swimming in a pool.

高三英语阅读理解中等难度题查看答案及解析