By the age of two, Heidi could count to 40, d...

By the age of two, Heidi could count to 40, draw pictures of people, and read books ________ for seven­year­olds.

A．meaning      B．meant

C．being meant      D．to mean

高三英语单项填空中等难度题查看答案及解析

Two middle-aged passengers fell into the sea. _______, neither of them could swim.

A. In fact　　 　　　　　　　　　 B. Luckily　　 　　　　　　　　　 C. Unfortunately　　 　　　　　　　　　 D. Naturally

高三英语单项填空中等难度题查看答案及解析

The sales of houses in our city fell by 40 percent last month, 48 percent __________ we don’t count low-price houses provided for poor residents.

A. as                             B. unless                                      C. if                                                D. before

高三英语单项填空中等难度题查看答案及解析

Before she could even talk, Ellie Heath spent hours drawing pictures. When she grew older, the 15-year old girl discovered the joy of sewing and found it calming, She started out to make small objects, like jewelry and soft toys. Over time, she began making clothing.

Her love for the creative work led her to open a business. Three Blue Bunnies is the name of her company, which produces what she calls “wearable art”. “My definition of ‘wearable art’ is something often handmade, designed to make you feel unique,” she explains. She sells her creations in farmers markets, at sales for local churches, and other places.

All the pieces Ellie creates are made of used or donated fabrics. She says there are 21 billion tons of cloth material in waste landfills(垃圾填埋场) in the United States. The teenager hopes to reduce that amount through her work. She works a lot with jean jackets, renewing them with artistic additions. The process starts with finding cloth material that looks good with the jackets.

Ellie's mom. Amy Heath, is a former school art teacher. “Creativity feeds kids' brains. I　 think it's very important for children to have as many opportunities as possible and be inspired by as many objects and people,” Amy says.

Ellie sharpened her creative skills at school. Cheryl Crow was one of her teachers early on. Crow called Ellie “a dream student”. Ellie worked hard and was always very creative, but also very kind, helpful to the other students. Students learned the basic sewing skills in Crow's class. Over the last three years, Ellie has created clothing for theatrical productions at Severna Park High School. Last year, Ellie designed several pieces for actors to wear in the school musical drama.

Ellie has many dreams. She wants to be a teacher and spread the joy of creativity among students. She also dreams her business will grow and become a model for other young people who have a dream they want to come true.

1.What is Ellie's goal of designing “wearable art”?

A.To help the poor people. B.To let people wear costly.

C.To collect unique clothing. D.To make wearers look special.

2.Which of the following best describes Ellie's clothing?

A.Ridiculous. B.Environmentally friendly.

C.Dirty D.Long lasting.

3.What is Amy's attitude towards Ellie's career?

A.Doubtful. B.Uncaring.

C.Supportive. D.Disapproving.

4.What does the author intend to express in paragraph 5?

A.Ellie donated lots of things to her school.

B.Ellie had various dreams over the last three years.

C.Great changes took place at Ellie's school last year.

D.Education contributed to Ellie's creativity in clothing.

高三英语阅读理解中等难度题查看答案及解析

If Sarkozy’s policy goes through, France will raise the retirement age       two years to 62 by 2018.

A．from  B．in        C．by       D．between

高三英语单项填空中等难度题查看答案及解析

Question are based on the following passage

1.

A. By picturing and adding maps.　　 B. By drawing and measuring points.

C. By storing and developing images.　　 D. By comparing and matching faceprints.

2.

A. Banks use it to offer a fast entry　　 B. It can only be used with permission

C. Companies use it for security　　 D. It can be used to meet customer's needs.

3.

A. Flexible　　 B. Neutral

C. Positive　　 D. Critical

高三英语短文中等难度题查看答案及解析

WASHINGTON—Two-thirds of the world’s polar bear population could be gone by 2050 if predictions of melting sea ice hold true, the US Geological Survey reported on Friday.

The fate of polar bears could be even worse than that estimate, because sea ice in the Arctic might be disappearing faster than the available computer models predict, the geological survey said in a report aimed at determining whether the big white bear should be listed as a threatened species.

“There is a definite link between changes in the sea ice and the welfare of polar bears,” said Steve Amstrup, who led the research team. He says Arctic sea ice is already at the lowest this year and is expected to retreat(退却) farther this month.

That means that polar bears—some 16,000 of them -- will disappear by 2050 from parts of the Arctic where sea ice is melting most rapidly, along the north coasts of Alaska and Russia, researchers said in a telephone briefing(简报).

Other polar bears could survive beyond that date but many of those could be gone by 2100, Amstrup said. By this century’s end, the only polar bears left might live in the Canadian Arctic islands and along the west coast of Greenland.

“It is likely to result in loss of approximately two-thirds of the world’s current polar bear population by the mid 21st century,” the report’s executive summary said.

“Because the observed trajectory(轨迹)of Arctic sea ice decline appears to be underestimated by currently available models, this assessment of future polar bear status may be conservative(保守的).”

In January, the US Fish and Wildlife Service proposed listing the polar bear as a threatened species, noting polar bears depend on sea ice as a platform to hunt seals, their main food.

Without enough sea ice, polar bears would be forced onto land, but they are poor hunters once they get out of the water and ice, the researchers said. The bears’ disappearance would probably take place as young cubs(幼兽)failed to survive to adulthood and females were unable to reproduce successfully.

1.What was the US Geological Survey intended to do?

A．To determine whether the polar bear was in danger.

B．To measure how fast the sea ice melts in the Arctic.

C．To check the predictions of the computer models.

D．To find out the exact number of the polar bear.

2.What causes the polar bears to disappear by 2050?

A．The pollution of the Arctic region.           B．The sea ice melting at high speed

C．Fewer food sources being left.             D．The temperature getting colder.

3.The key to preventing polar bears dying out seems to _______________.

A．help young polar bears to survive the cold winter

B．have large number of seals living in the oceans

C．make sure there is enough sea ice in the Arctic

D．provide chances for adult polar bears to reproduce

高三英语阅读理解中等难度题查看答案及解析

______ some users of the smart watches for two years, they draw a conclusion that it is necessary to renew the software.

A.Following B.To follow C.Followed D.Having followed

高三英语单项填空中等难度题查看答案及解析

The passport photographs of the future could turn out to be more than just another pretty picture if a new computer technique developed by Israeli scientists catches on.

Researchers at Ben-Gurion University, in Israel, have invented a way to hide information such as a fingerprint or signature in color images. They believe this could improve passport safety or be used to produce product bar codes(条形码) or designs that cannot be seen.

“The papers can be faxed, scanned(扫描) and reprinted without hidden data disappearing,” New Scientist magazine said last week.

Joseph Rosen and a team of scientists worked out the new instrument by creating a mathematical model.

The model turns a fingerprint or signature into a series of numbers which are used to shape the dots that make up a color picture.

“Each dot can be forced out of the usual place slightly without noticeably changing the final appearance of the image,” the magazine said.

Several images that can be hidden in a single picture are scanned into a computer which does the work.

The hidden images or fingerprints cannot be shown until the picture is scanned again.

The computer rebuilds the fingerprint by measuring the displacement of the dots in the picture.

The magazine said that if he model is used for passport checkpoints the picture can be unscrambled(解码) to show the fingerprint or signature and checked against the person holding the passport.

The researchers are now working on a handheld, and instrument which could make unscrambling the hidden information easier.

1. The new passport photos will probably contain all EXCEPT _____.

2. The writer probably got the information about the new passport photos from ___.

3.What is the best title for the passage?

高三英语阅读理解中等难度题查看答案及解析

DNA left at a crime scene could be used in the future to build up a picture of an offender’s face, it was revealed tonight.

A first step towards genetic mugshots has been taken by researchers in the US who link specific DNA markers with face shape. To identify the genes, they focused on known mutations(突变) that cause changes of the face and head. Normal versions of these genes were found to influence individual features. For instance, one gene affected the lips, another the shape and configuration of bones around the eyes, and a third the appearance of the mid-face and skull. In total, 20 genes had “significant effects” on facial appearance.

Lead scientist Professor Mark Shriver, from Pennsylvania State University, said: “We use DNA to match to an individual or identify an individual, but you can get so much more from DNA. Currently we can’t go from DNA to a face, or from a face to DNA, but it should be possible.” The implications are far reaching, raising the possibility of creating a data bank of facial types based on genetic markers. DNA from a crime scene could then be used to produce a rough image of the face of an offender or victim. Such genetic mugshots may be more reliable than computer-generated “e-fits” based on witnesses’ recollections. Other uses of the technique might include proving the identity of fathers in paternity cases, or visualising our remote ancestors from fossil DNA.

The scientists wrote in the online journal Public Library of Science Genetics: “Such predictive modelling could be forensically useful; for example, DNA left at crime scenes could be tested and faces predicted in order to help to narrow the pool of potential suspects. Further, our methods could be used to predict the facial features of descendants, deceased ancestors, and even extinct human species. In addition, these methods could prove to be useful diagnostic tools.” The team developed a model which first established a range of physical face shapes from people of mixed West African and European ancestry from the US, Brazil and Cape Verde. Measurements were taken of thousands of point co-ordinates on grids placed over 3D images of the faces.

Statistical methods were then used to determine the relationship between facial differences and the effects of gender, ethnic ancestry and individual gene variants.

1.The underlined word “mugshots” in the second paragraph most probably means _________.

A. different faces        B. characteristics    C. pictures of faces     D. genders

2.What can be inferred from the passage?

A. DNA has been used to build up a picture of an offender’s face.

B. It may be much easier to catch criminals with the help of DNA.

C. In all, 20 genes had “significant effects” on facial appearance.

D. One gene can affect more than one part of your face.

3.According to Professor Mark Shriver, we know_________.

A. they can merely match to an individual or identify an individual

B. there is a possibility of going from DNA to a face

C. DNA could be used to produce a rough image of an offender’s face

D. this technology is more reliable than computer-generated “e-fits”

4.What is the most possible title of the passage?

A. Creating a data bank of DNA

B. Recognizing the DNA of criminals

C. Predicting the location of offence using DNA

D. Building image of offender’s face from DNA

高三英语阅读理解中等难度题查看答案及解析