题目内容
______is still a question ______will win .
A It ; that B It ; who C That ; who D This ; who
B
口算能手系列答案_______ caused the accident is still a complete mystery.
| A．What | B．That | C．How | D．Where |
“Old wives tales” are beliefs passed down from one generation to another, For example, most of us remember our patents’ telling us to eat more of certain foods or not to do certain things. Is there any truth in these teachings? Some of them agree with present medical thinking, but others have not passed the test of time
Did your mother ever tell you to eat your carrots because they are good for your eyes? Scientists now report that eating carrots can help prevent a serious eye disease called macular degeneration Eating just one carrot a day can reduce the possibility of getting this disease by 40%. Garlic（蒜）is good for you, too。It can kill the type of virus that causes colds.
Unfortunately, not all of Mom’s advice passed the test of medical studies. For example, generations of children have been told not to go swimming within an hour after eating. But research suggests that there is no danger in doing so. Do sweets cause tooth problems? Well, yes and no. sticky sweets made with grains tend to cause more problems than sweets made with simple sugars.
Even though science can tell us that some of our traditional beliefs don’t hold water, there is still a lot of truth in the old wives’ tales, After all, much of this knowledge has been accumulated （积累） from thousands of our traditional beliefs don’t hold water should respect this body of knowledge even as research for clear scientific support to proven it true or false
【小题1】Which of the following is TRUE according to the text？
| A．Eating garlic is good for our eyes |
| B．Sticky sweets are damaging to our teeth |
| C．Swimming after a meal is dangerous。 |
| D．Carrots prevent people from catching colds |
| A．by cause and effects | B．by order in space |
| C．by order in time | D．by examples |
| A．to be believable | B．to be valuable | C．to be admirable | D．to be smtable |
| A．So objective | B．Objective | C．Dissatisfied | D．Curious |
You never see him, but they're with you every time you fly. They record where you are going, how fast you're traveling and whether everything on your airplane is functioning normally. Their ability to endure almost any disaster makes them seem like something out of a comic book. They're known as the black box.
When planes fall from the sky, as a Yemeni airliner did on its way to Comoros Islands in the India ocean on June 30, 2009, the black box is the best bet for identifying what went wrong. So when a French submarine (潜水艇) detected the box's homing signal five days later, the discovery marked a huge step toward determining the cause of a tragedy in which 152 passengers were killed.
In 1958, Australian scientist David Warren developed a flight-memory recorder that would track basic information like altitude and direction. That was the first mode for a black box, which became a requirement on all U.S. commercial flights by 1960. Early models often failed to withstand crashes, however, so in 1965 the box was completely redesigned and moved to the rear of the plane – the area least subject to impact – from its original position in the landing wells (起落架舱). The same year, the Federal Aviation Authority required that the boxes, which were never actually black, be painted orange or yellow to aid visibility.
Modern airplanes have two black boxes: a voice recorder, which tracks pilots' conversations, and a flight-data recorder, which monitors fuel levels, engine noises and other operating functions that help investigators reconstruct the aircraft's final moments. Placed in an insulated (隔绝的) case and surrounded by a quarter-inch-thick panels of stainless steel, the boxes can stand massive force and temperatures up to 2,000℉. When submerged, they're also able to emit signals from depths of 20,000 ft. Experts believe the boxes from Air France Flight 447, which crashed near Brazil on June 1,2009, are in water nearly that deep, but statistics say they're still likely to turn up. In the approximately 20 deep-sea crashes over the past 30 years, only one plane's black boxes were never recovered.
【小题1】What does the author say about the black box?
| A．It is an indispensable device on an airplane. |
| B．The idea for its design comes from a comic book. |
| C．Its ability to avoid disasters is incredible. |
| D．It ensures the normal functioning of an airplane. |
| A．witness | B．experience | C．resist | D．ensure |
| A．New materials became available by that time. |
| B．Too much space was needed for its installation. |
| C．The early models didn't provide the needed data. |
| D．The early models often got damaged in the crash. |
| A．There is an urgent need for them to be reconstructed. |
| B．There is still a good chance of their being recovered. |
| C．They have stopped sending homing signals. |
| D．They were destroyed somewhere near Brazil. |
Researchers at Massachusetts General Hospital for Children (MGHfC) have invented a new term that describes dangers associated with cigarette smoke: third-hand smoke. Study results published in January, 2009 discuss how third-hand smoke is especially dangerous for children.
Have you ever walked into a room that had the smell of cigarette smoke, regardless of the fact that a fan was moving the air and no one was smoking at the time? This is what researchers are calling third-hand smoke — and it represents the poisonous deposits (存积物) that are left behind long after a cigarette is put out.
Cigarette smoke contains gases and small particles that are deposited on every surface it comes in contact with, for example, the smoker’s hair and clothing, or the environment the cigarette was smoked in. It’s dangerous for young children who may crawl on polluted surfaces. Third-hand smoke is a serious health risk for our kids, especially those who live in the homes of smokers.
Jonathan Winickoff, lead author of the study, explains, “When you come into contact with your baby, even if you’re not smoking at the time, he or she comes in contact with those poisons. And if you breast-feed, the poisons will transfer to your baby in your breast milk.” Winickoff adds however, that nursing a baby if you’re a smoker is still a better choice than bottle-feeding.
Researchers involved in the study also surveyed more than 1,500 families in an effort to learn about adult attitudes regarding the danger third-hand smoke represents to their children and how that might affect smoking in the home.
Approximately 95 percent of nonsmokers and 84 percent of smokers believe that secondhand smoke is dangerous for children.
On the issue of whether third-hand smoke threatens the health of children, 65 percent of nonsmokers and 43 percent of smokers felt that third-hand smoke harms kids. When asked about rules regarding smoking in the home, approximately 88 percent of nonsmokers said they don’t allow smoking, while only 27 percent of smokers forbid smoking in the home.
However, both non-smokers and smokers who felt that third-hand smoking was harmful to children’s health were more inclined to (倾向于) restrict smoking in their homes.
【小题1】The study led by Jonathan Winickoff focused on _______.
| A．bad influences long after a cigarette is smoked |
| B．third-hand smoke and secondhand smoke |
| C．the bad effects of smoking on common people |
| D．the terrible smell of cigarette smoke |
| A．By telling results of a survey. |
| B．By giving statistics. |
| C．By making comparisons. |
| D．By giving an example. |
| A．keeping kids out of room when you smoke |
| B．cleaning the house to get rid of poisons |
| C．making yourself clean before contacting kids |
| D．trying to forbid smoking in home |