单选题Which of the following will not be used by air passengers to access Connexion?

单选题Never for a moment ______ that we would encounter so many problems.

单选题 A zoo is a place where animals are kept and displayed展示to the public.Some people arguethat a zoo need not be a place for animal display alone,and may also include raising animal species物种which are

单选题 We are what we eat, and now researchers are saying that our diet affects how we sleep. A study, published in the journal Appetite, found differences in the diets of people who slept for seven to eight hours a night compared with those snoozing for five. Since less sleep is associated with high blood pressure, poorer blood-glucose control (increasing the risk of diabetes) and obesity (as is more sleep in some studies), shouldn't we eat the foods that are most likely to help us sleep a healthy amount? And does anyone know what foods these are? The study in Appetite used data from the US National Health and Nutrition Examination Survey and found that those who slept the standard seven to eight hours ate the greatest variety of foods. Those who slept the least (less than five hours) drank less water, took in less vitamin C, had less selenium (硒) (found in nuts, meat and shellfish) but ate more green, leafy vegetables. Longer sleep was associated with more carbohydrates, alcohol and less choline (胆碱) (found in eggs and fatty meats) and less theorbomine (茶碱) (found in chocolate and tea). The researchers took into account other factors such as obesity, physical activity and income, and still found these differences in diet. They concluded that both long (nine hours-plus) and short sleep are associated with less varied diets but say they don't know if changing diet would affect how long we sleep for. The study shows only an association, although the link with short and long sleep both being 'unhealthy' holds true with a 2011 review of evidence about the length of sleep and risk of heart disease. The evidence on what diet would help us sleep best isn't clear. It is also not evident how much individual preferences for sleep—some like to sleep longer than others—affect these results. But there is more research on the relationship between sleep and weight, with studies showing the shorter the amount of sleep a person has, the hungrier they feel. A German study presented at the Annual Meeting of the Society for the Study of Ingestive (摄食的) Behaviour last year showed that after just one night of sleep disruption the volunteers in the study were less energetic (so used up fewer calories) but hungrier. The researchers said their volunteers also had raised blood levels of ghrelin (胃饥饿素), a hormone linked to the feeling of hunger. A commentary a few months later in the Journal of the Canadian Medical Association backed this association, saying that while encouraging a weight-loss regime of eating less, moving more and sleeping more might be too simplistic, diets were helped by good amounts of high quality sleep. So while no one knows what foods will stop you waking up at 5 am, you won't go wrong with a more varied diet and a sensible bedtime.

单选题 Imagine an animal that becomes frozen in cold weather. Then, when it gets warmer, the animal simply unfreezes and goes back to its normal life. Although this may sound like something from a science-fiction movie, it is exactly what happens to the wood frog over winter and spring. When winter begins, the frog, which is found throughout much of Canada, buries itself in leaves and dirt. As the ground begins to freeze, so does the frog's body. Normally, if a living creature is frozen, the cells inside its body are destroyed, leading to death. How, then, does the wood frog survive? The secret lies in the fact that although the water between the cells in the frog's body becomes frozen, the water inside the cells does not freeze. Before the winter begins, the frog stores starch in its body. As the weather gets colder, the drop in temperature causes the frog's body to change this starch into glucose. This glucose, in turn, lowers the temperature at which the liquid inside the frog's cells freezes. As a result, the cells do not freeze even at very low temperatures, allowing the frog to stay alive. Some wood frogs stay in this frozen state—with their hearts stopped completely—for months without harm. Now researchers are hoping to adapt the wood frog's secret to help them preserve human organs for transplants. Currently, after organs are removed from a donor's body, they are packed in a special liquid and kept very cold. However, they cannot be frozen because the ice would damage the cells in the organs. For this reason, the organs must be used quickly. If doctors had a way to preserve organs longer, they would have more time to find the best matches among people waiting for organ transplants. There is still a lot about the wood frog that scientists do not understand. They still have to work out, for example, exactly how the frog is able to unfreeze itself and what actually restarts the frog's heart when the weather becomes warmer. What is clear, however, is that lessons learned by studying this tiny creature could be of great benefit to humans in the near future.

单选题Minimum wage is the ______ amount of money per hour that an employer may legally pay a worker.

单选题She's fainted. Throw some water on her face and she may soon ______ .

单选题______ a fire, motel guests will be asked to keep calm.

单选题Citizens of developed and developing nations alike face dangers from ______ medicines; they pose a terrible hazard to public health.

单选题He began learning English______the age of five. [A] on [B] at [C] in

单选题 The statue would be perfect but for a few small defects in its base.

单选题(It was) (in the) primary school (where) my teacher introduced (me to) computers.A. It wasB. in theC. whereD. me

单选题Compared with SoBig. F, Blaster was a virus that was

单选题 Crash. Shatter. Boom. Crash. Shatter. Boom. Smattering of silly dialogue. Pretty girl screams: 'Dad!' Crash. Shatter. Boom. Silly dialogue. 'DAD!!!' Crash. Shatter. Boom. What? Oh, sorry. We were falling into a trance there. Which is, dear moviegoer, what may happen to you during Michael Bay's Transformers: Age of Extinction, the fourth Transformers film and lasts 165 minutes, which is precariously close to the three-hour mark that Bay undoubtedly will reach—by our sophisticated calculations, and at the current growth rate, with his sixth instalment. But let's not get ahead of ourselves. Despite what you've just read, this film will likely be a massive hit because by now, if you're buying a Transformers ticket, you surely know what you're getting into, and you want more, more, more. And Bay is the Master of More. Or just take it from the 11-year-old sitting next to me, who reserved any audible judgment—he, too was in a trance, though maybe from sugar intake—until the moment he saw a Transformer become a dinosaur. Overwhelmed by the pairing, he proclaimed, 'That's the sickest thing I've ever seen in my life.' It was as if peanut butter and jelly had been tasted together for the first time. This time, there's a whole new human cast. Most important, Mark Wahlberg has replaced Shia LaBeouf as well, Main Human Guy. A significant part of the movie also takes place in China—clearly a nod to the franchise's huge market in the country. In any case, we begin in Paris, Texas, where Cade Yeager (Wahlberg), a struggling inventor, is desperately seeking a big discovery. He's also a widowed dad, and super-protective (as the movie incessantly reminds us) of his high-school daughter, Tessa (Nicola Peltz, blond and pretty and ineffective, though the one-note script does her no favours). One day, Cade buys a rusty old truck. Examining it back home, he soon discovers it's none other than Optimus Prime, the Autobot hero, seriously damaged. As Cade works on fixing him up, his assistant, wisecracking surfer-dude Lucas, has the dumb idea of calling the authorities. What he doesn't know is that the government is plotting to destroy all remaining Autobots in favour of a man-made army of Transformers. He's being helped in this endeavour by the shadowy KSI Corporation, run by the nasty-but-complicated Joshua Joyce (Stanley Tucci). So now, it's evil humans that pitted against the trustworthy Autobots. So much for gratitude. There's also a subplot involving Tessa and her secret boyfriend, Shane (Jack Reynor, underused), whose Irish accent leads Cade to dismissively call him 'Lucky Charms'—at least until the two bond in battle. The obvious question: Is it too much for its own good? Bay is very talented at all things visual, the 3-D works well and the robots look great. But the final confrontation alone lasts close to an hour. At some point, you may find yourself simply in a daze, unable to absorb any further action into your brain.

单选题History has demonstrated that countries with different social systems can join hands in meeting the common challenges to human ______ and development. A. evolution B. survival C. satisfaction D. damage

单选题Social media is absolutely everywhere. Billions of people use social media on a daily basis to create, share, and exchange ideas, messages, and information. Both individuals and businesses post regularly to engage and interact with people from around the world. It is a powerful communication medium that simultaneously provides immediate, frequent, permanent, and wide-reaching information across the globe. People post their lives on social media for the world to see. Facebook, Twitter, Linkedln, and countless other social channels provide a quick and simple way to glimpse into a job candidate’s personal life—both the positive and negative sides of it. Social media screening is tempting to use as part of the hiring process, but should employers make use of it when researching a potential candidate’s background? Incorporating the use of social media to screen job candidates is not an uncommon practice. A 2018 survey found that almost 70% of employers use social media to screen candidates before hiring them. But there are consequences and potential legal risks involved too. When done inappropriately, social media screening can be considered unethical or even illegal. Social media screening is essentially scrutinising a job candidate’s private life. It can reveal information about protected characteristics like age, race, nationality, disability, gender, religion, etc. and that could bias a hiring decision. Pictures or comments on a private page that are taken out of context could ruin a perfectly good candidate’s chances of getting hired. This process could potentially give an unfair advantage to one candidate over another. It creates an unequal playing field and potentially provides hiring managers with information that can impact their hiring decision in a negative way. It’s hard to ignore social media as a screening tool. While there are things that you shouldn’t see, there are some things that can be lawfully considered—making it a valuable source of relevant information too. Using social media screening appropriately can help ensure that you don’t hire a toxic employee who will cost you money or stain your company’s reputation. Consider the lawful side of this process and you may be able to hire the best employee ever. There is a delicate balance. Screening job candidates on social media must be done professionally and responsibly. Companies should stipulate that they will never ask for passwords, be consistent, document decisions, consider the source used and be aware that other laws may apply. In light of this it is probably best to look later in the process and ask human resources for help in navigating it. Social media is here to stay. But before using social media to screen job candidates, consulting with management and legal teams beforehand is essential in order to comply with all laws.

单选题When I go out in the evening I use the bike __________ the car if I can.

单选题The Nobel Prizes are awards that are given each year for special things that people or groups ofpeople have achieved. They are awarded in six 21__________ : physics, chemistry, medicine, literature,pe

单选题Professor Smith and Professor Brown will ______ in giving the class lectures.