According to Part 3, DDS stands for_________.

According to the new research, the odd shape mounds were formed by______.

A．chemical events

B．geographical events

C．microbes

D．stromatolites

What seems to be the significance of the study according to Singer?

A．Spanking is added to be one of the factors affecting children"s acts.

B．Aggression of children will be given a serious study in later research.

C．Corporal punishment should be forbidden both at home and in school.

D．It adds credibility to the appeal of stopping punishing children physically.

HhAa33JiEe

A．FfGg45DdSs

B．SSRr66YyUU

C．QqOoOOPpBb

D．WwXX55VVFf

It only takes ten minutes, but reading your baby a bedtime story could yield benefits for years to come, scientists said today. Research shows that children who are【C1】______to a lot are faster at understanding words. This【C2】______processing helps them do better at school— and could【C3】______help them get a good job, have a happy【C4】______and keep on the right side of the law. Psychologist Anne Fernald said that the effects are so【C5】______that talking to children should be【C6】______as importantly as feeding them. And it is never too【C7】______to start. Dr Fernald said: "【C8】______you want your kid to do well in school, talk to them【C9】______a baby. If you bring a child into the world, we【C10】______the responsibility for feeding them, keeping them clean and keeping them safe. I think we now have enough scientific evidence to add something else to that list—and that is【C11】______learning from infancy on. Long before your baby is speaking, it is【C12】______information about language." In a series of studies on babies, Dr Fernald showed that there are big differences in how quickly children process words. Speedy processing is important【C13】______it frees up the brain to think about the next word—or the world【C14】______. Dr Fernald said: "You are building a mind that can conceptualize and【C15】______and think about the past and think about the future." She also showed that children who are【C16】______at understanding words tend to hear more words at home. In her studies, some【C17】______had as few as 600 words a day directly talked to them. To put this in【C18】______, the average adult speaks around 200 words a minute. Other children heard more than 12,000 words. Dr Fernald has also shown that children who can quickly process words at the age of two do better at school at the age of eight. Other research has shown that children who do well in【C19】______school are more likely to go onto higher education, get a good job, re-mam married and stay out of【C20】______.

【C1】

A．listened

B．spoken

C．replied

D．responded

Powell calls for drawdown from Iraq by mid-200His comments break his long public silence on the issue and place him______with the administration.

A．at will

B．at ease

C．at times

D．at odds

Two recent publications offer different assessment of the career of the famous British nurse Florence Nightingale. A book by Anne Summers seeks to debunk the idealizations and present a reality at odds with Nightingale’s heroic reputation. According to Summers, Nightingale’s importance during the Crimean War has been exaggerated: not until near the war’s end did she become supervisor of the female nurses.

Additionally, Summers writes that the contribution of the nurses to the relief of the wounded was at best marginal. The prevailing problems of military medicine were caused by army organizaitonal pratices, and the addition of a few nurses to the medical staff could be no more than symbolic. Nightingale’s place in the national pantheon, Summers asserts, is lrgely due to the propagandistic efforts of contemporary newspaper reporters.

By contrast, the editors of a new volume of Nightingale’s letters view Nightingale as a person who significantly influenced not only her own age but also subsequenct generations. They highlight her ongoing efforts to reform. sanitary conditions after the war. For example, when she learned that peacetime living conditions in British barracks were so horrible that the death rate of enlisted men far exeeded that of neighboring civilian populations, she succeeded in persuading the government to establish a Royal Commission on the Health of the Army. She used sums raised through public contributions to found a nurses’ traning hospital in London. Even in administrative matters, the editors assert, her practical intelligence was formidable: as recently as 1947 the British Army’s medical services were still using the cost-accounting system she had devised in the 1860’s.

I believe that the evidence of her letters supports continued respect for Nightingale’s brilliance and creativity. When counseling a village schoolmaster to encourage children to use their faculties of observation, she sounds like a modern educator. Her insistence on classifying the problems of the needy in order to devise appropriate treatments is similar to the approach of modern social workers. In sum, although Nightingale may not have achieved all of her goals during the Crimean War, her breadth of vision and ability to realize ambitious projects have earned her an eminent place among the ranks of social pioneers.

The passage is primarily concerned with evaluating______

A．the importance of Florence Nightingale’s innovations in the field of nursing

B．contrasting approaches to the writing of historical biography

C．contradictory accounts of Florence Nightingale’s historical significance

D．the quality of health care in nineteenth-century England

E．the effect of the Crimean War on developments in the field of health care

Can Burglars Jam Your Wireless Security System?

A)Any product that promises to protect your home deserves careful examination. So it isn&39;t surprising that you’ll find plenty of strong opinions about the potential vulnerabilities of popular home-security systems.

B)The most likely type of burglary(入室盗窃)by far is the unsophisticated crime of opportunity, usually involving a broken window or some forced entry. According to the FBI, crimes like these accounted for roughly two-thirds of all household burglaries in the US in 2013. The wide majority of the rest were illegal, unforced entries that resulted from something like a window being left open. The odds of criminal using technical means to bypass a security system are so small that the FBI doesn’t even track those statistics.

C)One of the main theoretical home-security concerns is whether or not a given system is vulnerable to being blocked from working altogether. With wired setups, the fear is that a burglar(入室盗贼)might be able to shut your system down simply by cutting the right cable. With a wireless setup, you stick battery-powered sensors up around your home that keep an eye on windows, doors, motion, and more. If they detect something wrong while the system is armed, they’ll transmit a wireless alert signal to a base station that will then raise the alarm. That approach will eliminate most cord-cutting concerns—but what about their wireless equivalent, jamming? With the right device tuned to the right frequency, what’s to stop a thief from jamming your setup and blocking that alert signal from ever reaching the base station?

D)Jamming concerns are nothing new, and they’re not unique to security systems. Any device that’s built to receive a wireless signal at a specific frequency can be overwhelmed by a stronger signal coming in on the same frequency. For comparison, let’s say you wanted to “jam” a conversation between two people—all you’d need to do is yell in the listener’s ear.

E)Security devices are required to list the frequencies they broadcast on—that means that a potential thief can find what they need to know with minimal Goog ling. They will, however, need to know what system they’re looking for. If you have a sign in your yard declaring what setup you use, that ’d point them in the right direction, though at that point, we’re talking about a highly targeted, semi-sophisticated attack, and not the sort of forced-entry attack that makes up the majority of burglaries. It’s easier to find and acquire jamming equipment for some frequencies than it is for others.

F)Wireless security providers will often take steps to help combat the threat of jamming attacks. Simpli Safe, winner of our Editors’ Choice distinction, utilizes a special system that’s capable of separating incidental RF interference from targeted jamming attacks. When the system thinks it’s being jammed, it’ll notify you via push alert (推送警报). From there, it’s up to you to sound the alarm manually.

G)Simpli Safe was singled out in one recent article on jamming, complete with a video showing the entire system being effectively bypassed with hand held jamming equipment. After taking appropriate measure to contain the RF interference to our test lab, we tested the attack out for ourselves, and were able to verify that it is possible with the right equipment. However, we also verified that Simpli Safe’s anti-jamming system works. It caught us in the act, sent an alert to my smart phone, and also listed our RF interference on the system’s event log. The team behind the article and video in question make no mention of the system, or whether or not it detected them.

H) We like the unique nature of that software. It means that a thief likely wouldn’t be able to Google how the system works, then figure out a way around it Even if they could, SimpliSafe claims that its system is always evolving, and that it varies slightly from system to system, which means there wouldn’t be a universal magic formula for cracking it Other systems also seem confident on the subject of jamming. The team at Front point addresses the issue in a blog on its site, citing their own jam protection software and claiming that there aren’t any documented cases of a successful jam attack since the company began offering wireless security sensors in the 1980s.

I)Jamming attacks are absolutely possible. As said before, with the right equipment and the right know-how, it’s possible to jam any wireless transmission. But how probable is it that someone will successfully jam their way into your home and steal your stuff?

J) Let’s imagine that you live in a small home with a wireless security setup that offers a functional anti-jamming system. First, a thief is going to need to target your home, specifically. Then, he’s going to need to know the technical details of your system and acquire the specific equipment necessary for jamming your specific setup. Presumably, you keep your doors locked at night and while you&39;re away, so the thief will still need to break in. That means defeating the lock somehow, or breaking a window. He’ll need to be jamming you at this point, as a broken window or opened door would normally release the alarm. So, too, would the motion detectors in your home, so the thief will need to continue jamming once he’s inside and searching for things to steal. However, he’ll need to do so without tripping the anti-jamming system, the details of which he almost certainly does not have access to.

K) At the end of the day, these kinds of systems are primarily designed to protect against the sort of opportunistic smash-and-grab attack that makes up the majority of burglaries. They’re also only a single layer in what should ideally be a many-sided approach to securing your home, one that includes common sense things like sound locks and proper exterior lighting at night. No system is impenetrable, and none can promise to eliminate the worst case completely. Every one of them has vulnerabilities that a knowledgeable thief could theoretically exploit. A good system is one that keeps that worst-case setting as improbable as possible while also offering strong protection in the event of a less-extraordinary attack.

36.It is possible for burglars to make jamming attacks with the necessary equipment and skill.

37.Interfering with a wireless security system is similar to interfering with a conversation.

38.A burglar has to continuously jam the wireless security device to avoid triggering the alarm, both inside and outside the house.

39.Simpli Safe provides devices that are able to distinguish incidental radio interference from targeted jamming attacks.

40.Only a very small proportion of burglaries are committed by technical means.

41.It is difficult to crack SimpliSafe as its system keeps changing.

42.Wireless devices will transmit signals so as to activate the alarm once something wrong is detected.

43.Different measures should be taken to protect one’s home from burglary in addition to the wireless security system.

44.Simpli Safe’s device can send a warning to the house owner’s cellphone.

45.Burglars can easily get a security device’s frequency by Internet search.

请帮忙给出每个问题的正确答案和分析，谢谢！

【填空题】AV Clip 3: Recovery from strokeAV 3 Recovery From Stroke.mp4 Watch the video clip three times and complete the following passage by filling in each blank with the word from the video clip. More than 750,000 Americans suffer a stroke each year. The odds of recovery depend on many factors including the person’s age, (1) ________ of the stroke, and how quickly they can get treatment. About half of stroke patients recover (2) _______ well so they can live independently or with only limited assistance. But even those who make a swift recovery can experience a (3) _________ decline in the five years following their stroke, new research finds. Doctors at Columbia University studied 525 patients who had suffered a stroke and rated them (4) ___________ on their ability to do daily tasks such as climbing stairs, getting (5) ____________, and eating meals. Even among those who had recovered they found the odds of living independently decreased by nine percent per year while the rate of (6) __________ increased by eleven percent per year. Patients who had private insurance or Medicare (7) ___________ better than those with no insurance or Medicaid. Researchers say strokes should be treated as chronic conditions. Patients may need ongoing physical (8) _________ and help managing their blood pressure and other risk factors.