题目
题型：不详难度：来源：
There are a couple of reasons why bats rest this way. First of all, it puts them in a position for takeoff. Unlike birds, bats can’t fly into the air from the ground. Their wings don’t produce enough lift to take off from a dead stop, and their hind legs are so small and underdeveloped that they can’t run to build up the necessary takeoff speed. Instead, they use their front claws to climb to a high spot, and then fall into flight.
During the hours when most enemies are active, bats gather where few animals would think to look and most can’t reach. This allows
them to disappear from the world until night comes again. There’s also little competition for these resting spots, as other flying animals don’t have the ability to hang upside down.Bats have a unique physiological adaptation that lets them hang around this way without using a
ny energy. For you to hold your fist around an object tight, you contract（紧缩）several muscles in your arm, which are connected to your fingers by ten
dons（腱）；as one muscle contracts, it pulls a tendon, which pulls one of your fingers closed. A bat’s talons（爪）close in the same way, except that their tendons are connected only to the upper body, not to a muscle. To hang upside down, a bat pulls its claws open with other muscles. To get the talons to take hold of the surface, the bat simply lets its body relax. The weight of the upper body pulls down on the tendons connected to the talons, causing them to hold tight. Therefore, the bat doesn’t have to do anything to hang upside down.小题1:Bats hang upside down because________．
| A．they haven’t developed a pair of strong claws | B．they can’t start to fly from the ground directly |
| C．they have no hind legs to support their body | D．they can’t find quiet places to stay during the day |
| A．is to save their energy for night movement | B．is a way to fight against flying animals |
C．is a great way to hide from danger | D．is a skill to compete for the flying places |
| A．Because their upper body is light. |
| B．Because they have strong muscles. |
| C．Because their talons are linked to muscles tightly. |
| D．Because their tendons are linked to their upper body. |
| A．The living habits of bats. | B．How and why bats  hang upside down. |
| C．The importance of bats’ hanging upside down. | D．How bats use their energy at night. |
答案
小题1:B
小题1:C
小题1:D
小题1:B
解析
核心考点
试题【At night, bats fly through the air, catching hundreds of insects and other small】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
Taking a look at why cloning might be beneficial, among many cases, it is arguable that parents who are known to be at risk of passing a genetic limitation to a child could make use of cloning. If the clone was free of genetic limitations. Then the other clone would be as well. The latter could foe inserted in the woman and allowed to ripen to term. Moreover，cloning would enable women, who can’t get pregnant, to have children of their own.
Cloning humans would also mean that organs could be cloned, so it would be a source of perfect transfer organs. This, surely would be greatly beneficial to millions of unfortunate people around the world that are expected to lose their lives due to failure of single(or more) organ(s）.It is also arguable that a ban on cloning may be unlawful and would rob people of the right to reproduce and limit the freedom of scientists.
Arguments against cloning are also on a perfectly practical side. Primarily, I believe that cloning would step in the normal “cycle”of life. There would be a large number of same genes., which reduce the chances of improvement，and, in turn, development-the fundamental reason how living things naturally adapt to the ever-changing environment. Life processes failing to do so might result in untimely disappearance. Furthermore, cloning would make the uniqueness that each one of us possesses disappea. Thus, leading to creation of genetically engineered groups of people for specific purposes and, chances are, that those individuals would be regarded as “objects” rather than people in the society.
Scientists haven’t 100 percent. guaranteed that the first cloned will be normal. Thus this could result in introduction of additional limitations in the human “gene-pool”.
Regarding such arguable topics in “black or white” approach seems very innocent to me personally. We should rather try to look at all “shades: of it. I believe that cloning is only legal if its purpose is for cloning organs, not humans. Then we could regard this as for “saving life” instead of “creating life”. I believe cloning humans is morally and socially unacceptable.
小题1:Which of the following is true according to the passage？
| A．Genetic limitation will be beneficial for some women |
| B．A large number of genes will prevent us from developing |
| C．Prohibition of cloning might limit the freedom of scientists |
| D．First cloned humans might be normal according to scientists |
| A．Cloning should be entirely banned |
| B．Cloning should be used in creating life |
| C．Cloning will take away the right to reproduce |
| D．Cloning is acceptable if it is used for cloning organs |
| A．In a story book. | B．In a magazine. | C．In a science fiction | D．In a brochure |
ips with more than a limited number of people. No matter how hard the Internet tries to put you in communication, its best efforts will be defeated by your mind.The problem is twofold（双重的）. First, there is a limit on the number of people we can hold in mind and have a meaningful relationship with. That number is about 150 and is set by the size of our brain. Second, the quality of your relationships depends on the amount of time you invest in then. We invest a lot in a small number of people and then distribute what’s left among as many others as we can. The problem is that if we invest little time in a person, our engagement with that person will decline until eventually it dies into “someone I once knew”.
This is not, of course, to say that the Internet doesn’t serve a socially valuable function. Of course it does. But the question is not that it allows you to increase the size of your social circle to include the rest of the world, but that you can keep your relationships with your existing friends going even though you have to move to the other side of the world.
In one sense, that’s a good thing. But it also has a disadvantage. If you continue to invest in your old friends even though you can no longer see them, then certainly you aren’t using your time to make new friends where you now live. And I suspect that probably isn’t the best use of your time. Meaningful relationships are about being able to communicate with each other, face to face. The Internet will slow down the rate with which relationships end, but it won’t stop that happening eventually.
小题1:The number of friends we can keep relationships with is decided by__________.
| A．the Internet | B．the time we have | C．the place we live | D．the mind |
nd paragraph probably means “__________”.| A．appointment | B．connection | C．interview | D．agreement |
| A．the Internet helps to keep in touch with friends far away |
| B．the Internet determines the quality of social relationships |
C．the Internet greatly increases the size of social circles |
| D．the Internet is of no value in social communication |
| A．To keep in touch with old friends when we have moved away. |
| B．To chat with friends often on the Internet. |
| C．To make more new friends face to face. |
| D．To stop using the Internet to make new friends. |
| A．He thinks it useless | B．He is hopeful of it. |
| C．He approves of it. | D．He doubts it. |
Considering that 15 percent of American children aged 6 to 18 are overweight, supporters say more money and thought must be put into phys ed curriculum. In many cases, that may mean not just replacing the old gym-class model with fitness programs but also starting up phys ed programs because school boards often "put P.E. on the chopping block (砧板), cutting it entirely or decreasing its teachers or the days it is offered," says Alicia Moag-Stahlberg, the executive director of Action for Health Kids. The difference in phys ed programs is partly due to the lack of a national standard. "Physical education needs to be part of the core curriculum," she added.
The wisdom of the new approach has some scientific support. Researchers at the University of Wisconsin have showed how effective the fit-for-life model of gym class can be. They observed how 50 overweight children lost more weight when they cycled and skied cross-country (越野)than when they played sports. The researchers also found that teaching sports like football resulted in less overall movement, partly because some reluctant（不情愿的）students were able to sit on the bench.
Another problem with simply teaching group sports in gym class is that only a small percentage of students continue playing them after graduating from high school. The new method teaches skills that translate to adulthood.
小题1:According to the passage, what is usually taught in the old gym class?
| A．Lift weights | B．Climb a rope | C．Cycle | D．Have a balanced diet |
| A．Schools do not pay enough attention to P. E.. |
| B．Schools welcome P. E. but do not have time for it. |
| C．Schools put P.E. in the first place. |
| D．Schools cut down other subjects’ time for P. E.. |
| A．More teenagers are overweight. |
| B．Traditional group sports teaching is not effective. |
| C．Students need to learn some skills to help them lead a physically active life. |
| D．Phys ed programs need less money to support. |
| A．Two | B．Three | C．Four | D．One |
| A．The Phys ed teaches group sports. |
| B．The Phys ed provides more fitness programs. |
| C．The Phys ed teaches tools and skills which could be used in the future life. |
| D．The Phys ed has more support from the government. |
However, watchmakers optimistically say that watches regain popularity when consumers reach their 20s and 30s. By then, they are willing to spend money on a quality timepiece that doesn"t just keep good time. Fifty years ago, watchmakers boasted(自夸) about their products" accuracy. But in recent years, the watch industry has transformed itself into an accessory(附件，配件) business. And for many today, the image(外形) a watch communicates has become more important than the time it tells.
"Complications" ─ features that go beyond simple timekeeping ─ are an important part of a watch"s image. Today"s watches offer a host of features that suit almost any personality. These features include altitude trackers(追踪器), compasses(指南针), lunar calendars, USB drives, and even devices that measure the effectiveness of golf swings!
Creativity is also a key element in today"s watches. For example, Japanese watchmaker Tokyoflash makes watches that don"t even look like watches. The company"s popular Shinshoku model uses different color lights to tell the time. It looks more like a futuristic bracelet(手镯) than a watch. Another Japanese watchmaker, EleeNo, makes a "handless" watch. Using a ring of circles to keep time, this watch makes an excellent conversation piece.
Whether a watch communicates fashion sense, creative flair or a love of sports, consumers want their timepieces to stand out. Nowadays, everyone has the same kind of gadget in their bags, so people want to make a statement with what"s on their wrists(手腕). Will this interest in wrist fashion last? Only time will tell!
小题1:Why aren’t watches popular with young people as before?
| A．Because watches cannot keep good time as cell phones, mini laptops and MP3 players. |
| B．Because watches are featured by the disadvantages of simple function |
| C．Because watches are too expensive to afford. |
| D．Because watches don’t have beautiful appearance as other modern time telling tools. |
| A．Watching-making is facing a survival crisis challenge. |
| B．Watching-making is faced with the developing opportunity. |
| C．Watching-making becomes the sun rising industry. |
| D．Watching-making has a specific development target. |
| A．people will gradually lose interest in watches as they grow older |
| B．watchmakers hardly change the development strategy for watches |
| C．today’s watches are better than those in the past in quality |
D．customers used t o be more concerned with the quality of a watch than with its image. |
| A．multifunction | B．accuracy | C．nice design | D．low price |
| A．Watches and Teenagers | B．The History of Watches |
| C．The Accuracy of Watches | D．Watches Tell More Than Time |
One theory is that wolves howl to bond better together. It’s almost as if howling together helps the pack stay together. Perhaps something similar to people feeling a sense of involvement with each other when singing a song together. But this theory may be wrong, explains Fred H. Harrington, a professor who studies wolf behaviour.
Indeed, there have been times when wolves have been seen one moment howling in a chorus, and the next, quarreling among each other. It appears that usually the lowest-ranking members of the pack may actually be “punished” for joining in the chorus at times. So is howling a way to strengthen a social bond or just a way to reconfirm status a
mong its members? —Why do wolves howl for sure?What is clear, however, is that howling is often used among packmates to locate each other. Hunting grounds are distant and it happens that wolves may separate from one another at times. When this happens, howling appears to be an excellent means of gathering.
Howling, interestingly, is a contagious behaviour. When one wolf starts to howl, very likely others will follow. This is often seen to occur in the morning, as if wolves were doing some sort of “roll call” where wolves all howl together to report their presence.
小题1:What is the possible similarity between wolves’ howling together and humans’ singing in chorus?
| A．The act of calling each other. | B．The sense of accomplishment. |
| C．The act of hunting for something. | D．The sense of belonging to a group. |
| A．Wolves separate from each other after howling. |
B．Wolves tend to protect their huntin g grounds. |
| C．Wolves sometimes have quarrels after howling together. |
| D．Wolves of low rank are encouraged to join in the chorus. |
| A．show their ranks | B．find their companions |
| C．report the missing ones | D．express their loneliness |
| A．howling is a signal for hunting |
| B．howling is a way of communication |
| C．howling often occurs in the morning |
| D．howling spreads from one to another |
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