Researchers to develop vaccines and this will probably take several months to complete. A. are working B. worked C. will work D. has worked 题目和参考答案——青夏教育精英家教网—

题目内容

15. Researchers _______ to develop vaccines and this will probably take several months to complete.

A. are working B. worked C. will work D. has worked

练习册系列答案

68所名校图书小升初高分夺冠真卷系列答案

伴你成长周周练月月测系列答案

小升初金卷导练系列答案

相关题目

During a state of deep relaxation, several physiological changes take place in the body: the body’s oxygen consumption is reduced; the heart beat decreases; muscle tension and sweating ease, and there is decreased sympathetic （交感的） nervous system activity．This restful state not only allows the body to repair and restore itself, but it has a calming effect on the consciousness．
How to achieve this state of relaxation, however, is a matter of opinion, and in some medical circles, a matter of controversy．A recent report by Dr．David Holmes of the University of Kansas in the journal “American psychologist” said that simply sitting in an armchair has just as many beneficial characteristics for the body as meditation （冥想） does．Researchers of other relaxation techniques disagree．These experts believe that more structured techniques, such as meditation, lead to a condition of deep relaxation．
The debate goes on, but one thing appears to be clear: the relaxation response can be reached by a number of methods, and the methods themselves are not as important as getting there．One day, one method may work best; on another day, an alternative method may be more appropriate．Once you are aware of all the methods, you can find the one that works best on you．
Some of the relaxation techniques are meditation, auto analysis and progressive muscle relaxation response．More than just sitting quietly in a chair, they have the added benefit of structure and discipline, and for these reasons appear to be more effective for most individuals．
【小题1】According to the passage, which of the following statements is NOT true when a person is in a state of deep relaxation?

A．The body takes in less oxygen．

B．The heart beats less frequently．

C．Muscles become tense and the body sweats easily．

D．The consciousness becomes more or less calmed．

【小题2】People seem to agree that ____．

A．sitting in an armchair benefits a person as meditation does

B．structured relaxation techniques are more beneficial for a person

C．to achieve a state of deep relaxation is possible through various means

D．what people are all struggling for is a state of deep relaxation

【小题3】In the third paragraph, the phrase “getting there” means _____．

A．arriving at one’s destination

B．getting what one wants most

C．finding out a suitable relaxation technique

D．reaching a state of deep relaxation

【小题4】The author’s attitude toward relaxation discussed in the passage is best described as ______．

Hee-haw! Scores of farms across the country are opening up to overnight guests. The best have all the appeal of a first-rate inn ----- plus here a moo, there a moo.
Sure, you and your kids plan to conquer the theme parks. In the meanwhile, why not make a little hay? Farm stays are fast becoming the great American alternative to the pre-packaged vacation.
LIBERTY HILL FARM
Rochester, Vt.; 802/767-3926; www.libertyhillfarm.com. Adults$75, teens $50,kids 12 and under $35, including breakfast and dinner; shared baths.
Beth and Bob Kennett run a farm straight out of a storybook. You’ll find Beth in the kitchen, rolling out dough（生面团） for a pie. Bob’s busy with other work. Guests sleep in seven sunny bedrooms right in the farmhouse and can participate in any of the farm jobs. Maybe you and your kids won’t be up at 6 a.m. to meet the milk truck, but you can help with the milking twice a day, collect eggs, and pick sweet corn and wild blackberries in season.
HULL-O FARM
Durham, N.Y.; 518/239-6950; www.hull-o.com; Adults $110, kids 10—14 $60, 5—9 $50, 2—4 $35, under 2 free, including breakfast and dinner; private baths.
It started in 1993 as a way to bring in some extra money at a time of falling milk prices. But soon after Frank and Sherry Hull opened their Catskill Mountains dairy farm to overnight visitors, they discovered they loved it. As you drive up, Sherry greets you on the porch（入口处）of the 1825 farmhouse with a cow-shaped cookie jar. Before long your kids are playing around with the cows, sheep, ducks, goats and getting ready for a hayride（乘坐装满干草的牛车出游）.
MERAMEC FARM CABINS
Bourbon, Mo.; 573/732-4765; http://www.wine-mo.com Doubles with private bath $75, $10 per additional person. Trail and riding fees extra.
Climb onto the back of the Ford pickup and catch up with the herd. One gentle cow named Cricket will even let the kids sit on her back. At the barn（牲口棚）, Carol will introduce you to the horses ---15 Missouri Fox Trotters --- and lead you on a trail ride over the hills and down along the spring-fed Meramec River, where everyone swims. Grab a fishing pole and head back to the river. When you have your fill of the wild, try Carol and Dave’s favorite restaurants or wineries（酿酒厂）, within 20 miles of the farm.
【小题1】The underlined sentence in the first paragraph implies that ___________.

A．you can enjoy the best cuisine at the first rate restaurant

B．some farm provide country experiences as well as good accommodations

C．farm work is hard, but you can enjoy it a lot, playing with the animals

D．if you want to hear a cow’s cry, please stay on a best farm

【小题2】We can learn from the three ads that _____________.

A．Hull-O Farm was not built for overnight visitors

B．Frank and Sherry Hull run a farm out of a storybook

C．kids can sit on a gentle cow’s back on Hull-O Farm

D．you can’t milk a cow if you get up late on Liberty Hill Farm

【小题3】 The Browns have a 13-year-old son and 11-year-old daughter. If they stay on Liberty Hill Farm for one night, how much will they pay?

【小题4】Who will be most likely interested in the webpage?

A．Kids who want to find pleasure in the theme parks.

B．People who expect to be employed on the farm.

C．Researchers who are interested in raising cows on farms.

D．Those who plan to have family vacations on working farms.

Computers might not be clever enough to trick adults into thinking they are intelligent yet, but a new study, led by Javier' Movellan at the University of Califomia San Diego, shows that a giggling (咯咯笑的) robot is clever enough to get toddlers (初学走路者) to treat it as a peer (同龄人).
The researchers stationed a 2-foot-tall robot Called QRIO in a classroom of a dozen toddlers aged between 18 months and two years. QRIO stayed in the middle of the room using its sensors (传感器) to avoid bumping (碰撞) into the kids. It was programmed to giggle when the kids touched its head, to occasionally sit down, and to lie down when its batteries died.
"We expected that after a few hours, the magic was going to disappear," Movellan says. "That's what was found with earlier robots." But, in fact, the kids remained interested in the robot over several weeks, eventually communicating with QRIO in much the same way they did with other toddlers.
The researchers measured the relationship between the children and the robot in several ways. Firstly, as with other toddlers, they touched QRIO mostly on the arms and hands, rather than on the face or legs. For this age group, "the amount of touching is a good predictor of how you are doing as a social being," Movellan says.
The children helped the robot up when it fell, and when QRIO's batteries ran out and it lay down, a toddler would come up and cover it with a blanket and say "night, night". However, when QRIO was programmed to spend all its time dancing, the kids quickly lost interest. When the robot went back to its old self, the kids treated it like a peer again.
"The study shows that current technology is very close to being able to produce robots able to develop a special relationship with toddlers," says Movellan. But, he adds, it is not clear yet whether robots can interest older children or adults in the same way.
1. What does the underlined word "stationed" in Paragraph 2 probably mean?
A. Hid. B. Observed. C. Placed. D. Named.
2. At the beginning of the experiment, researchers .
A. feared that the robot would harm the toddlers
B. programmed the robot to move freely about the classroom
C. expected the robot to communicate with the toddlers
D. thought the toddlers' interest in the robot wouldn't last long
3. Kids aged between 18 months and two years behave
as social beings by.
A. giggling B: touching C. toddling D. dancing
4. What would be the best title for the passage?
A. Giggling robot becomes one of the kids
B. Giggling robot used as a classroom assistant
C. Giggling robot makes kids more active in class
D. Giggling robot attracts more attention from kids

With only about 1,000 pandas left in the world, China is desperately trying to clone (克隆) the animal and save the endangered species(物种). That's a move similar to what a Texas A&M University researchers have been undertaking for the past five years in a project called “Noah's Ark”.
Noah's Ark is aimed at collecting eggs, embryos(胚胎)，semen and DNA of endangered animals and storing them in liquid nitrogen（氮）. If certain species should become extinct , Dr. Duane Kraemar, a professor in Texas A&M University Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future.
It is estimated that as many as 2,000 species of mammals , birds reptiles will become extinct in over 100 years . The panda, native only to China , is in danger of becoming extinct in the next 25 years .
This week , Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit . They are now trying to implant the embryo into a host animal.
The entire procedure could take from three to five years to complete.
“The nuclear transfer(核子移植) of one species to another is not easy, and the lack of available(capable of being used) panda eggs could be a major problem，” Kraemer believes. “They will probably have to do several hundred transfers to result in one pregnancy(having a baby). It takes a long time and it’s difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort, ”adds Kraemer, who is one of the leaders of the Project at Texas A & M, the first–ever attempt at cloning a dog.
“They are trying to do something that’s never been done, and this is very similar to our work in Noah’s Ark. We’re both trying to save animals that face extinction. I certainly appreciate their effort and there’s a lot we can learn from what they are attempting to do. It’s a research that is very much needed.”
【小题1】 The aim of “Noah’s Ark” project is to ________.

A．make efforts to clone the endangered pandas

B．save endangered animals from dying out

C．collect DNA of endangered animals to study

D．transfer the nuclear of one animal to another

【小题2】Ａccording to Professor Kraemer , the major problem in cloning pandas would be the lack of _______.

A．available panda eggs	B．host animals
C．qualified researchers	D．enough money

【小题3】The best title for the passage may be ______.

A．China’s Success in Panda Cloning

B．The First Cloned Panda in the World

C．Exploring the Possibility to Clone Pandas

D．China---the Native Place of Pandas Forever

Keeping a busy social life among lots of friends may keep people thinner than spending hours doing some exercises, according to scientists. They say that socialising and meeting with friends help increase levels of brown fat in the body which burns calories(卡路里)to produce heat.
Living in an exciting social environment was found to reduce fat in mice's belly by half over four weeks, even if they ate more. US researchers say that social excitement aids weight loss by turning white fat into brown. White fat stores calories and makes us fatter, while brown burns energy to produce heat. Turning white fat into brown is extremely difficult，normally
requiring long- term stay in cold conditions or exciting part of the body's nervous system.
However, scientists from Ohio State University now think that having a busy social life is an even more effective way of changing white fat into brown. The team came up with their theory by studying the effects of various living environments on mice. Those, who lived alongside a greater number of mice, had more space and toys to excite themselves and then lost far more weight over the course of the study than their “couch potato" fellows.
Study author, Dr Matthew During, whose team's findings appear in the journal Cell Metabolism, said, "I'm still amazed at the degree of fat loss that occurs." Explaining how new technology had threatened face-to-face socialising, he added, "It's not just a sedentary(久坐的)lifestyle and high calorie foods, but an increasing lack of social activities." Co-author Dr Lei Cao said，"Loneliness is a potential factor for cancer and death; it's equal to cigarette smoking to a certain extent. Social activities are very vital.，，
【小题1】What information can we get from the first two paragraphs?

A．Brown fat stores calories and makes us fatter.

B．It doesn't take long to turn white fat into brown.

C．Social excitement helps gain more weight.

D．Brown fat can burn energy to produce heat.

【小题2】Which of the following statement does the text support?

A．Levels of brown fat can be increased by socialising.

B．The mice lacking social life lose more weight.

C．The research findings haven't been published so far.

D．Dr Matthew During wasn't convinced of the result.

【小题3】We can conclude from the text that _______.

A．the fat in mice's belly was reduced because of the relaxing environment

B．a sedentary lifestyle and high calories foods influence people's social life