China has become the first country to land a spacecraft on the far side of the moon. The unmanned Chang’e-4 probe (探测器) - the name was inspired by an ancient Chinese moon goddess
2 . Race walking shares many fitness benefits with running, research shows, while most likely contributing to fewer injuries. It does, however, have its own problem.
Race walkers are conditioned athletes. The longest track and field event at the Summer Olympics is the 50-kilometer race walk, which is about five miles longer than the marathon. But the sport’s rules require that a race walker’s knees stay straight through most of the leg swing and one foot remain in contact (接触) with the ground at all times. It’s this strange form that makes race walking such an attractive activity, however, says Jaclyn Norberg, an assistant professor of exercise science at Salem State University in Salem, Mass.
Like running, race walking is physically demanding, she says, According to most calculations, race walkers moving at a pace of six miles per hour would burn about 800 calories(卡路里) per hour, which is approximately twice as many as they would burn walking, although fewer than running, which would probably burn about 1,000 or more calories per hour.
However, race walking does not pound the body as much as running does, Dr. Norberg says. According to her research, runners hit the ground with as much as four times their body weight per step, while race walkers, who do not leave the ground, create only about 1.4 times their body weight with each step.
As a result, she says, some of the injuries associated with running, such as runner’s knee, are uncommon among race walkers. But the sport’s strange form does place considerable stress on the ankles and hips, so people with a history of such injuries might want to be cautious in adopting the sport. In fact, anyone wishing to try race walking should probably first consult a coach or experienced racer to learn proper technique, she says. It takes some practice.
1. Why are race walkers conditioned athletes?A.They must run long distances. |
B.They are qualified for the marathon. |
C.They have to follow special rules. |
D.They are good at swinging their legs. |
A.It’s more popular at the Olympics. |
B.It’s less challenging physically. |
C.It’s more effective in body building. |
D.It’s less likely to cause knee injuries. |
A.Getting experts’ opinions. |
B.Having a medical checkup. |
C.Hiring an experienced coach. |
D.Doing regular exercises. |
A.Skeptical. | B.Objective. |
C.Tolerant. | D.Conservative. |
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:1. 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。
I love doing housework. I always assist my parents in doing the dish after meals. I also water the flowers in the yard and tidying up my own bedroom whatever necessary. In my opinion, students can benefit a lot doing some housework. Firstly, doing housework was helpful for us to be a responsible person. Also, it gives our parents more time to do what they are like and it improves the family relationship. What’s most, doing housework can be a form of mentally relaxation from study. That’s our view on housework. And hopes this can inspire more thinking on the topic!
The polar bear is found in the Arctic Circle and some big land masses as far south as Newfoundland. While they are rare north of 88°, there is evidence
Modern methods
5 . Some individuals are born with a gift for public speaking.
People want to listen to someone who is interesting, relaxed and comfortable. Too often when you stand up to give a speech, you focus on the “public”at the expense of the “speaking. ”
Even the most successful public speaker will make mistakes. Yet, the only one who cares about any mistake is the one who is speaking. People’s attention wanders constantly. In fact,most people only absorb about 20 percent of a speaker’s message. So, don’t stop speaking when you make a mistake unless it’s a truly serious one.
Your goal is not to be a perfect public speaker.
A.Do the opposite. |
B.You want to be an effective public speaker. |
C.You don’ t need to apologize for a minor slip. |
D.When it comes to public speaking, less is usually more. |
E.The objective of most speeches is to benefit the audience |
F.Take the fear out of public speaking by focusing on your listeners |
G.However, the majority of people are effective speakers because they train to be. |
6 . As data and identity theft becomes more and more common, the market is growing for biometric(生物测量) technologies—like fingerprint scans—to keep others out of private e-spaces. At present, these technologies are still expensive, though.
Researchers from Georgia Tech say that they have come up with a low-cost device(装置) that gets around this problem: a smart keyboard. This smart keyboard precisely measures the cadence(节奏) with which one types and the pressure fingers apply to each key. The keyboard could offer a strong layer of security by analyzing things like the force of a user’s typing and the time between key presses. These patterns are unique to each person. Thus, the keyboard can determine people’s identities, and by extension, whether they should be given access to the computer it’s connected to—regardless of whether someone gets the password right.
It also doesn’t require a new type of technology that people aren’t already familiar with. Everybody uses a keyboard and everybody types differently.
In a study describing the technology, the researchers had 100 volunteers type the word “touch” four times using the smart keyboard. Data collected from the device could be used to recognize different participants based on how they typed, with very low error rates. The researchers say that the keyboard should be pretty straightforward to commercialize and is mostly made of inexpensive, plastic-like parts. The team hopes to make it to market in the near future.
1. Why do the researchers develop the smart keyboard?A.To reduce pressure on keys. | B.To improve accuracy in typing. |
C.To replace the password system. | D.To cut the cost of e-space protection. |
A.Computers are much easier to operate. |
B.Fingerprint scanning techniques develop fast. |
C.Typing patterns vary from person to person. |
D.Data security measures are guaranteed. |
A.It’ll be environment-friendly. | B.It’ll reach consumers soon. |
C.It’ll be made of plastics. | D.It’ll help speed up typing. |
A.A diary. | B.A guidebook | C.A novel. | D.A magazine. |
7 . Researchers say they have translated the meaning of gestures that wild chimpanzees (黑猩猩) use to communicate. They say wild chimps communicate 19 specific messages to one another with a “vocabulary” of 66 gestures. The scientists discovered this by following and filming groups of chimps in Uganda, and examining more than 5,000 incidents of these meaningful exchanges.
Dr Catherine Hobaiter, who led the research, said that this was the only form of intentional communication to be recorded in the animal kingdom. Only humans and chimps, she said, had a system of communication where they deliberately sent a message to another group member.
“That’s what’s so amazing about chimp gestures,” she said. “They’re the only thing that looks like human language in that respect.”
Although previous research has shown that apes and monkeys can understand complex information from another animal’s call, the animals do not appear to use their voices intentionally to communicate messages. This was a significant difference between calls and gestures, Dr Hobaiter said.
Chimps will check to see if they have the attention of the animal with which they wish to communicate. In one case, a mother presents her foot to her crying baby, signaling: “Climb on me.” The youngster immediately jumps on to its mothers back and they travel off together. “The big message from this study is that there is another species (物种) out there. that is meaningful in its communication, so that’s not unique to humans,” said Dr Hobaiter.
Dr Susanne Shultz, an evolutionary biologist from the University of Manchester, said the study was praiseworthy in seeking to enrich our knowledge of the evolution of human language. But, she added, the results were “a little disappointing”.
“The vagueness of the gesture meanings suggests either that the chimps have little to communicate, or we are still missing a lot of the information contained in their gestures and actions,” she said. “Moreover, the meanings seem to not go beyond what other animal convey with non-verbal communication. So, it seems the gulf remains. ”
1. What do chimps and humans have in common according to Dr Hobaiter?A.Memorizing specific words. | B.Understanding complex information. |
C.Using voices to communicate. | D.Communicating messages on purpose. |
A.It was well designed but poorly conducted. |
B.It was a good try but the findings were limited. |
C.It was inspiring but the evidence was unreliable. |
D.It was a failure but the methods deserved praise. |
A.Difference. | B.Conflict. | C.Balance. | D.Connection. |
A.Chimpanzee behaviour study achieved a breakthrough |
B.Chimpanzees developed specific communication skills |
C.Chimpanzees: the smartest species in the animal kingdom |
D.Chimpanzee language: communication gestures translated |
8 . It’s about 250 miles from the hills of west-central Iowa to Ehlers’ home in Minnesota. During the long trip home, following a weekend of hunting. Ehlers
Back home, Ehlers was troubled by that
A local farmer told them the dog sounded like one
Jeff had
Ehlers returned to Minnesota, and then drove 100 miles to Minneapolis to put Rosie on a flight to Michigan. “It’s good to know there’s still someone out there who
“I figured whoever lost the dog was probably just as
A.read | B.forgot | C.thought | D.heard |
A.fighting | B.trembling | C.eating | D.sleeping |
A.tried | B.agreed | C.promised | D.regretted |
A.calmed down | B.stood up | C.rolled over | D.run off |
A.injured | B.stolen | C.lost | D.rescued |
A.home | B.past | C.back | D.on |
A.preparation | B.explanation | C.test | D.search |
A.cautiously | B.casually | C.skillfully | D.angrily |
A.surprise | B.joy | C.hesitation | D.anxiety |
A.predicted | B.advertised | C.believed | D.recorded |
A.house | B.phone | C.street | D.car |
A.called | B.copied | C.counted | D.remembered |
A.fed | B.adopted | C.found | D.cured |
A.hunted | B.skied | C.lived | D.worked |
A.on purpose | B.on time | C.in turn | D.in vain |
A.cares | B.sees | C.suffers | D.learns |
A.place | B.trouble | C.waste | D.extreme |
A.service | B.plan | C.effort | D.team |
A.equal | B.allergic | C.grateful | D.close |
A.suitable | B.proud | C.wise | D.willing |
According to a review of evidence in a medical journal, runners live three years
The best exercise is one that you enjoy and will do. But otherwise… it's probably running. To avoid knee pain, you can run on soft surfaces, do exercises to
10 . The small town of Rjukan in Norway is situated between several mountains and does not get direct sunlight from late September to mid-March-
“Of course, we
But that
“People have been
“It’s not very
A.only | B.obviously | C.nearly | D.precisely |
A.fear | B.believe | C.hear | D.notice |
A.empty | B.blue | C.high | D.wide |
A.cloudy | B.normal | C.different | D.warm |
A.helped | B.changed | C.happened | D.mattered |
A.computers | B.telescopes | C.mirrors | D.cameras |
A.remembered | B.forecasted | C.received | D.imagined |
A.repair | B.risk | C.rest | D.use |
A.forbids | B.directs | C.predicts | D.follows |
A.day | B.night | C.month | D.year |
A.library | B.hall | C.square | D.street |
A.appeared | B.returned | C.faded | D.stopped |
A.driving | B.hiding | C.camping | D.sitting |
A.pictures | B.notes | C.care | D.hold |
A.new | B.full | C.flat | D.silent |
A.block | B.avoid | C.enjoy | D.store |
A.Instead | B.However | C.Gradually | D.Similarly |
A.nature-loving | B.energy-saving | C.weather-beaten | D.sun-starved |
A.big | B.clear | C.cold | D.easy |
A.trying | B.waiting | C.watching | D.sharing |