Even if you are an experienced backpacker or climber,you need to know what to do if something goes wrong.It is not that Alaska is that much more dangerous than other places.It is no more _ than elsewhere,as long as the proper precautions are taken.So, being prepared is crucial to ensure a safe trip. First of all,make sure you pack everything you will need for your trip.Even if you are traveling by car,pack clothes and gear for backpacking.Because of the bad weather, cars break down frequently. Pack a survival kit full with:a down coat, boots ,mittens, a hat, snow-pants,sleeping bags,candles,a flashlight,and high-energy food. If you are traveling by car , also pack extra belts, a shovel, and a chain. If you are camping or hiking,make sure you know how to avoid bears.If you are lost in the wilderness, there is no doubt you will encounter them. However,there is no need to be nervous.Just take these precautions:make noise as you walk,bears will avoid you;cook your food away from where you sleep,and store your food away from where you sleep,so the bears are not attracted.Both of these should keep the bear away.However,if you do encounter a bear,there are two different schools of thought.One is to make noise and scare the bear away.The other is to stand still and speak softly to get the bear to leave.If you are dealing with a brown bear,you can climb a tree,since it cannot follow.But,black bears can climb.If for some reason the bear attacks,play dead.Try to protect your head and neck,and hopefully the bear will leave its"dead" prey. All the following can most probably protect you EXCEPT that _ . A) you can try to make noise as possible as you can B) you can say something in a soft voice to the bear C) you can try to learn to climb up a tall tree nearby D) you can pretend to be dead when you are in danger
C
Dogs have an understanding of fair play and become angry if they feel that another dog is getting a better deal, a new study has found. The study looked at how dogs react when a companion is rewarded for the same trick in an unequal way. Friederike Range, a researcher at the University of Vienna in Austria, and her colleagues did a series of experiments with dogs who knew how to respond to the command "give the paw ". The dogs were normally happy to repeatedly give the paw, whether they got a reward or not. But that changed if they saw that another dog was being rewarded with a piece of food, while they received nothing. "We found that the dogs hesitated significantly longer when obeying the command to give the paw," the researchers write. The unrewarded dogs eventually stopped cooperating. Scientists have long known that humans pay close attention to inequity. But researchers always assumed that animals didn't share the trait. "The argument was that this is a uniquely human phenomenon," says Frans de Waal, a professor of psychology at Emory University in Atlanta. That changed in 2003 when he and a colleague did a study on monkeys. The monkeys had to hand a small rock to researchers to get a piece of cucumber in return. They were happy to do this. But if they saw that another monkey was getting a more delicious reward, a grape, for doing the same job, they would throw away the food and rock, and at some point just stopped performing. In that experiment, the monkeys considered the fairness of two different types of payment. But when Range and her colleagues did a similar study with their trained dogs, testing to see if dogs would become upset if they only got dark bread when other dogs received sausage, they found that as long as the dogs got some kind of food payment, even if it wasn't the most delicious kind, the animals would play along. What is the main idea of the passage? A) Animals have various ways to show their anger. B) Dogs are less intelligent than monkeys. C) Dogs have a sense of fairness. D) Most animals want to be rewarded equally.
C
Q: The possibility that pleasant smells might reduce pain has recently been suggested by new research. In a scientific study, doctors asked 20 men and 20 women to keep their hands in very hot water for as long as possible while breathing in different smells. As people believe that strong smells can affect the senses, volunteers were asked not to eat or drink for eight hours before the experiment began. During the experiment, volunteers were asked to take in pleasant smells such as vanilla , and unpleasant smells such as durians . The volunteers kept their hands in the water until it became too hot for them. When they could not bear the pain any more, they took their hands out of the water. Scientists are interested in whether the senses or smell is related to pain and whether men and women have the same senses. Now, the study has proved that for women, pleasant smells reduce pain. For men, there is no change. Dr Finkelstein has been studying smells since 1999. He says that scientists already have data from 40 volunteers. He adds that this year, scientists will test another 60 volunteers and will be in a better position to explain the results. One explanation is that women's sense of smell developed long ago, and is linked to recognizing the smell of babies. Scientists used to believe that mothers recognized their children by sight only. Now, they have started to believe that the sense of smell also helps, but why pleasant smells do not reduce pain in men is a question still to be answered by scientists. From the passage we learn that _ . A) the reason why women are sensitive to smells is clear B) the experiment for the sense of smell has come to an end C) unpleasant smells affect men's senses more than women's D) scientists have not totally explained the result of the study
A: D
(Question)
Almost every family buys as least one copy of a newspaper every day. Some people subscribe to as many as two or three different newspapers. But why do people read newspapers? Five hundred years ago,news of important happenings--battles lost and won,kings or rulers overthrown or killed--took months and even years to travel from one country to another. The news passed by word of mouth and was never accurate. Today we can read in our newspapers of important events that occur in far away countries on the same day they happen. Apart from supplying news from all over the world,newspapers give us a lot of other useful information. There are weather reports, radio, television and film guides, book reviews, stories, and of course, advertisements. The bigger ones are put in by large companies to bring attention to their products. They pay the newspapers thousands of dollars for the advertising space, but it is worth the money, for news of their products goes into almost every home in the country. For those who produce newspapers, advertisements are also very important. Money earned from advertisements makes it possible for them to sell their newspapers at a low price and still make a profit. The habit of reading newspapers is _ A) widespread B) found among a few families C) not popular D) uncommon
(Answer)
A