It can’t be a（n） _______ that four jewelry st...

It can’t be a（n） _______ that four jewelry stores were robbed in one night．

高三英语单项填空简单题查看答案及解析

While jewelry made from gold can be beautiful, most people admit that wearing the heavy metal over long periods of time can get a little annoying. Now, researchers from Swiss university ETH Zurich have created a new form of lightweight gold that weighs five to ten times less than traditional 18-carat gold—which typically consists of 75 percent gold and 25 percent copper—but has the same purity.

The researchers began by mixing gold with water, salt, protein fibers and other materials. They then replaced the water with alcohol and placed the mixture inside a high-pressure carbon dioxide (CO2) box. The reaction between the gas and alcohol transformed the golden plastic into a light material that can be heated to melt and made into whatever form was needed. "This gold has some characteristics of plastic,” says team leader Raffaele　　　　　　　　 Mezzenga, professor of Food and Soft Materials at ETH Zurich.

In addition to being lighter, the "plastic” gold has other advantages over traditional forms. It can be melted into shape at about 105 degrees Celsius, much lower than the 1,064 degrees Celsius required to melt pure 24-carat gold. The metal's firmness can be easily adjusted by changing the components at the beginning of the process. It is also much easier to vary the color. "As a general rule, our approach lets us create almost any kind of gold we choose, in line with the desired properties, says Mezzenga.

The researchers, who published their study in the journal Advanced Functional Materials on January 10, 2020, believe the new lightweight gold will be able to replace the metallic version in most traditional applications, including jewelry and watches. However, given that most buyers associate high-quality gold with weight, that may take some time. But the material will undoubtedly be beneficial for use inside electronic devices, chemical catalysts (催化剂),and even radiation shielding.

1.Why do many people find the traditional gold annoying?

A.It costs too much。

B.Its purity is too low.

C.It feels too heavy to wear long.

D.Its beauty lasts a short time,

2.What is the second paragraph mainly about?

A.The functions of the "plastic" gold.

B.The components of the "plastic” gold.

C.The characteristics of the "plastic” gold.

D.The production process of the "plastic" gold.

3.Which is the "plastic" gold's advantage over the traditional gold?

A.It is easier to process.

B.It is more widely used.

C.It has a lower temperature.

D.It is more convenient to get.

4.Where is this text most likely from?

A.A diary. B.A guidebook.

C.A novel. D.A magazine.

高三英语阅读理解中等难度题查看答案及解析

Four Wild Animal Species Were Endangered

Maybe you can still see them at the zoo. But that doesn’t mean they’re doing alright in the wild.

Tigers

All six tiger species are endangered, with Suatran tigers and South China tigers at a seriously endangered status. The main reasons for their population decline are illegal hunting and destroyed habitats, as humans clear forests to gather timber and build roadways. Only about 3890 tigers presently live in the wild.

Ground squirrels

That’s right, even squirrels are endangered, specifically the San Joaquin ground squirrel. Native to California, USA, these guys have been disappearing since 1979 on account of the construction and human developments going through their habitat. Their total population is unknown, but it could be anywhere between 124000 and 4130000.

Giraffes

The International Union for the Conservation of Nature recently put giraffes at a vulnerable status, the level just before endangered. The giraffe population has declined 40 percent in the last 30 years, primarily due to loss of habitat and illegal hunting. Some giraffes are killed just for their tails, which are considered status symbols in Africa.

Asian elephants

The main threat to Asian elephants, one of the most intelligent animals, is their shrinking habitat. As the human population grows, people invade their land to build roads and railway tracks. Elephants in Myanmar are at an especially high risk for being captured and traded or used illegally in the tourist industry. Fewer than 50000 are left on the entire continent.

1.Why is the population of tigers becoming smaller?

A. People hunt illegally and destroy their living spots.

B. It is difficult for tigers to fit in with their environment.

C. The forests are not suitable for their living.

D. The tigers are a threat to the residents nearby.

2.What’s the main reason why some animals are in danger according to the passage?

A. Climate changes.　　 B. Human activities.

C. Lack of food.　　 D. Serious pollution.

3.The tails of 　　　　 are regarded as status symbols in Africa.

A. tigers’　　 B. ground squirrels’

C. giraffes’　　 D. Asian elephants’

4.What can we infer from the passage?

A. The giraffe population has increased greatly in the last 30 years.

B. The number of squirrels is between 124000 and 4130000.

C. Elephants in Myanmar are completely caught and even killed.

D. The present situation of endangered animals is worrying.

高三英语阅读理解简单题查看答案及解析

Four Wild Animal Species Were Endangered

Maybe you can still see them at the zoo. But that doesn’t mean they’re doing alright in the wild.

Tigers

All six tiger species are endangered, with Sumatran tigers and South Chin tigers at a seriously endangered status. The main reasons for their population decline are illegal hunting and destroyed habitats(栖息地), as humans clear forests to gather timber（木材）and build roadways. Only about 3890 tigers presently live in the wild.

Ground squirrels

That’s right, even squirrels are endangered, specifically the San Joaquin ground squirrel. Native to California, USA, these guys have been disappearing since 1979 on account of the construction and human developments going through their habitat. Their total population is unknown , but it could be anywhere between 124000 and 413000.

Giraffes

The International Union for the Conservation of Nature recently put giraffes at a vulnerable status, the level just before endangered. The giraffe population has declined 40 percent in the last 30 years, primarily due to loss of habitat and illegal hunting. Some giraffes are killed just for their tails, which are considered status symbols in Africa.

Asian elephants

The main threat to Asian elephants, one of the most intelligent animals, is their shrinking habitat. As the human population grows, people invade their land to build roads and railway tracks. Elephants in Myanmar are at an especially high risk for being captured and traded or used illegally in the tourist industry. Fewer than 50000 are left on the entire continent.

1.What is the total population of tigers living in the wild?

A. Around 3890.

B. 50000.

C. 124000.

D. 413000.

2.Which of the following is considered one of the most intelligent animals?

A. Tigers.

B. Giraffes.

C. Ground squirrels.

D. Asian elephants.

3.What is the common threat to the four wild animals?

A. Illegal hunting.

B. Disturbed habitat.

C. Developing tourism.

D. Unnecessary construction.

4.Which word can best describe the present situation for protecting wild animals?

A. Satisfactory.

B. Optimistic.

C. Urgent.

D. Stable.

高三英语阅读理解简单题查看答案及解析

The cracked step four years ago was the start of it. That day, I awoke tired—the children were tiny and needing so much—and I had a golden afternoon of rest ahead, my mother stepping in to allow me to catch up on my sleep. I dropped them off and drove home—the sun shining and my bed signaling. As I was about to enter the house, I caught sight of a deep crack beneath my feet.

Without thinking, I turned around, walked back to the car and drove to a DIY store. Four hours later, I had all the tools, mixed my own cement, filled in the crack and repaired the foundation. Perfect. As I stood up to take a photo of my handiwork, I realized that I was trembling. I’d forgotten my shot at a nice long nap, and my children were already on their way home. That sleep... that promise to self was broken, because I had focused, instead, on the crack in the step.

Suddenly, everything started to hurt. My head, my throat, my back. I couldn’t stop shaking. What earned then is that when we break the promises we make to our bodies they will not be silenced. This is when we overwork and overthink to the point of breaking down. Ironically (讽刺地), for many of us, it is only when we have no choice— when we fall ill—that we learn to listen. For me, when that crack ended in a hospital stay which sent me to bed for two unmoving weeks when my body worked to clear two different infections, the lesson is ever present. I did it to myself—a whole twisted spin on DIY.

Sadly it took another two ridiculous DIY projects to finally get through. The cracks will never be fully filled. Focus, then, on your own inner core, the feeding of light, fire and strength.

1.What made the author so sleepy in the first place?

A.Taking care of the kids. B.Asking her mother for help.

C.Driving to her mother’s house D.Dealing with DIY projects.

2.How did the author feel as soon as she finished her repair work?

A.Regretful B.Upset

C.Proud D.Thankful

3.What can be implied from Paragraph 3?

A.Our health is ignored deliberately.

B.Our body will respond to what we do.

C.The author took her mother’s advice.

D.The author was infected before the DIY.

4.What is the author’s purpose in writing the text?

A.To describe an unfortunate event.

B.To show the danger of DIY.

C.To stress the importance of sleep.

D.To encourage focusing on oneself.

高三英语阅读理解中等难度题查看答案及解析

The cracked (有裂缝的)step four years ago was the start of it. That day, I awoke tired-the children were tiny and needing so much — and I had a golden afternoon of rest ahead, my mother stepping in to allow me to catch up on my sleep. I dropped them off and drove home -the sun shining and my bed signaling. As I was about to enter the house, I caught sight of a deep crack beneath my feet.

Without thinking, I turned around walked back to the car and drove to a DIY store. Four hours later, I had all the tools, had mixed my own cement (水泥), filled in the crack and repaired the foundation. Perfect. As I stood up to take a photo of my handiwork, I realized that I was trembling. I'd forgotten my shot at a nice long nap, and my children were already on their way home. That sleep... that promise to self was broken, because I had focused, instead, on the crack in the step.

Suddenly, everything started to hurt. My head, my throat, my back. I couldn't stop shaking. What earned then is that when we break the promises we make to our bodies they will not be silenced. This is when we overwork and overthink to the point of breaking down. Ironically, for many of us, it is only when we have no choice — when we fall ill — that we learn to listen. For me, when that crack ended in a hospital stay which sent me to bed for two unmoving weeks while my body worked to clear two different infections, the lesson is ever present. I did it to myself — a whole twisted spin on DIY.

Sadly it took another two ridiculous DIY projects or the message to finally get through. The cracks will never be fully filled. Focus, then, on your own inner core the feeding of that light, that fire and that strength.

1.What made the author so sleepy in the first place?

A.Taking care of the kids. B.Visiting her mother.

C.Doing the housework. D.Dealing with DIY projects.

2.How did the author feel as soon as she finished her repair work?

A.Regretful. B.Upset.

C.Proud. D.Thankful.

3.What is the author's purpose in writing the text?

A.To present a way to fill a crack.

B.To show the danger of DIY.

C.To stress the importance of sleep.

D.To encourage focusing on oneself.

4.What is the best title for the text?

A.The Cracked Step B.You Do It to Yourself

C.Focus on DIY D.A Life-changing Experience

高三英语阅读理解中等难度题查看答案及解析

Anger is an acid that can do more harm to the vessel in which it is stored than to anything　　 it is poured

A.whenever B.that C.on which D.wherever

高三英语单项填空中等难度题查看答案及解析

Is it a wonder that _____ little cells can store _____ much energy?

A．such, so       B．so, much       C．so, so         D．such, such

高三英语单项填空中等难度题查看答案及解析

Is it a wonder that ____little cells can store ________　much energy?

高三英语单项填空中等难度题查看答案及解析

Is it a wonder that _____ little cells can store _____ much energy?

高三英语单项填空简单题查看答案及解析