Bad teeth may be painful and it’s getting worse without treatment. They can even
题型：不详难度：来源：
Bad teeth may be painful and it’s getting worse without treatment. They can even ruin your life. Illness of the teeth can find its way into the blood system. This can increase the chances of a heart disease or other illnesses.
Experts say good care for teeth should start at birth. Mothers’ milk is the best food for the healthy development of teeth.
But dentists say a baby’s mouth and early teeth should be cleaned after each feeding. Use a cloth with a little warm water. Do the same if a baby is fed with a bottle. Experts say if you decide to put your baby to sleep with a bottle, give him only water.
When baby’s teeth begin to appear, you can clean them with a wet toothbrush. Dentists say it is important to find soft toothbrushes made especially for babies and to use them very gently. Young children often eat toothpaste (牙膏) when they brush, so they should be carefully watched when they brush their teeth.
Parents often ask what effect thumb sucking (咬手指) might have on their baby’s teeth. Experts generally agree that this is fine early in life. Most children stop sucking their thumbs by the age of four. If it continues, parents should talk to their children’s dentist or doctor.
Dentists say children should have their first dental visit by the time they are one year old. They say babies should be examined when their first teeth appear usually at around six months.
小题1:Why should people pay attention to teeth problems?| A．They can cause other illnesses. | | B．They will bring bad luck. | | C．They will bring the family much trouble. | | D．They usually last a long time. |
小题2: According to the writer, baby’s teeth should be protected from the day ______.| A．he begins to speak | B．he has his first tooth | | C．he was born | D．he is fed with bottle milk |
小题3:The underlined word “it” in Paragraph 5 refers to “_____”.| A．toothache | B．parents’ trouble | C．thumb sucking | D．experts’ advice |
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答案
小题1:A
小题2:C
小题3:C |
解析
试题分析：文章建议人们要关注牙齿问题，因为牙齿问题会导致其他疾病，孩子从一出生就要保护牙齿，平时要注意牙齿的护理和检查。
小题1:细节题：从文章第一段的句子：They can even ruin your life. Illness of the teeth can find its way into the blood system. This can increase the chances of a heart disease or other illnesses.可知牙齿问题会导致其他疾病，所以人们要注意牙齿问题，选A
小题2:细节题：从文章第二段的句子：Experts say good care for teeth should start at birth.可知婴儿的牙齿从出生就要保护，选C
小题3:指代题：从文章第五段的句子：Most children stop sucking their thumbs by the age of four. If it continues, parents should talk to their children’s dentist or doctor.可知it是指thumb sucking “咬手指”，选C |
举一反三
The weather predictions for Asia in 2050 read like a story from a doomsday movie.
Many experts and green groups fear they will come true unless there is a united global effort to hold back greenhouse gas outpouring. In the decades to come, Asia---home to more than half the world’s 63 billion people-will change from one climate extreme to another, with tired farmers battling droughts, floods, disease, food shortages and rising sea levels.
“It’s not a pretty picture,” said Steve Sawyer, climate policy adviser with Greenpeace in Amsterdam. Global warming and changes of weather patterns are already occurring and there is more than enough carbon dioxide and other greenhouse gases in the atmosphere to drive climate change for decades to come.
Already, changes are being felt in Asia but worse is likely to come, Sawyer and top climate bodies say, and could lead to mass migration and widespread human disasters. According to predictions, icebergs will melt faster, some Pacific and Indian Ocean islands will have to evacuate(疏散) or build sea defenses, storms will become more intense and insect and water-borne diseases will move into new areas as the world warms.
All this comes with rising populations and demand for food, water and other resources. Experts say environmental worsening such as deforestation and pollution will probably enlarge the results of climate change.
In what could be a sign of the future, Japan was hit by a record of 10 typhoons and tropical storms this year, while two-thirds of Bangladesh, parts of Nepal and large areas of northeastern India were flooded, affecting 50 million people, destroying livelihoods and making tens of thousands ill.
The year before, a winter cold struck and a summer heat wave killed more than 2,000 people in India.
小题1:This passage is mainly about .| A．what kind of weather we like best | | B．the weather predictions for Asia in the future and the reasons | | C．how to improve our environment | | D．that the world will not be suitable for us to live in |
小题2:In the future the Asian farmers will have to face the following except .| A．food shortages | B．droughts | C．wars | D．floods |
小题3:The underlined word “doomsday” may give us the feeling of .| A．happiness | B．sadness | C．peace | D．excitement |
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Chinese scientists have found a new way to use cells found in human urine （尿液）that could aid in the treatment of a range of nerve disorders.That is a new technique for reprogramming cells in human urine into nerve progenitor cells that can grow into multi-functional nerve and brain cells.
The technique is expected to be used in the study and treatment of nerve disorders such as Parkinson"s disease, Alzheimer"s disease and other nerve disorders.
Pei Duanqing, a professor at Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, said his research team has combined an episomal system to deliver reprogramming factors with a chemically defined culture medium to reprogram kidney epithelial(肾表皮) cells in urine into NPCs.
These NPCs, normally only found in the human brain, were later proven to be transgene-free and self-renewing, he said.
"These nerve and brain cells can survive for up to one month when transplanted into the brain of a newborn rat," said Pei. "My team is working hard to understand why our experimental condition allowed the urine cells to become NPCs, because we want to improve the technique and make it more efficient".
Scientists have long searched to treat and study neural disorders by obtaining and transplanting neural stem cells. However, the previous method of getting and using cells from either fetal (胎儿)or adult human tissue remains challenging due to ethical concerns and immune system rejections, he said.
Pei hopes the discovery will be used to generate NPCs from patients with nerve disorders such as Parkinson"s disease. "These NPCs from patients may help us discover new drugs for these diseases."
"It is a remarkable advance in the stem cell field. The results and methods obtained from this study will be of great value and significance to the field, " said Fred Gage,a professor with the Salk Institute for Biological Studies.
小题1:What is the passage mainly about?| A．NPCs are beneficial in treating human diseases. | | B．Chinese scientists succeeded in making NPCs from human urine. | | C．Chinese scientists have found cures for all diseases. | | D．A new technique was used to study the use of human urine |
小题2:Pei and his tean try their best to work hard in order to .| A．make more contributions to medical study | | B．discover another new technique | | C．make the technique more perfect | | D．treat more patients suffering from bad diseases |
小题3:What is the challenge of making NPCs in the previous method?| A．The ethical comcerns and immune system refusal | | B．The difificulties in getting cells from human. | | C．The under-developed techniques in medical science. | | D．The lack of financial support from the government. |
小题4:From the last paragraph we can infer .| A．the new technique will be developed in science | | B．the results and methods will be applied to treating cancers | | C．the study will give a major push to the stem cell field | | D．the mew technique will bring great profis |
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Popeye the Sailor first became a popular cartoon in the 1930s. the sailor in that cartoon ate lots of spinach to make him strong. People watched him, and they began to buy and eat a lot more spinach. Popeye helped sell 33 percent more spinach than before! Spinach became a necessary part of many people’s diets. Even some children who hated the taste began to eat the vegetable.
Many people thought that the iron in spinach made Popeye strong, but this is not true. Spinach does not have any more iron than any other green vegetable.
People only thought spinach had a lot of iron because the people who studied the food made a mistake. In the 1890s, a group of people studied what was inside vegetables. This group said that spinach had ten times more iron than it did. The group wrote the number wrong, and everyone accepted it.
Today, we know that the little iron in spinach cannot make a difference in how strong a person is. However, spinach does have something else which the body needs—folic acid.
It is interesting to point out that folic acid can help make a person strong. Maybe it was really the folic acid that made Popeye strong all along.
小题1:A good title for this reading passage is______.| A．Popeye the Sailor | | B．The Truth About Spinach | | C．A Mistake with Numbers | | D．Folic Acid Makes You Strong |
小题2:Why did many people eat spinach after they saw Popeye the Sailor?| A．People liked folic acid. | | B．They thought Popeye was funny. | | C．Spinach had a lot of iron. | | D．They thought spinach made them strong. |
小题3:A research group told people that spinach______.| A．made Popeye strong | | B．was a green vegetable | | C．had less iron than other green vegetables | | D．had more iron than other green vegetables |
小题4:The reading passage says that perhaps Popeye got his strength from______.| A．iron | B．spinach | C．folic acid | D．exercise |
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You have some great ideas. But they don’t come out because of what your friends say or because you think that only a few people can be creative geniuses(天才). And, you, of course, think that you couldn’t be one of them. But actually, this is not true at all.
Anyone who is a creative genius will tell you that creativity is very much like a muscle that needs to be developed. If you don’t learn how to develop creative thinking, this skill, just like a muscle, will become poor and useless. On the other hand, keep working at it, and this skill will soon be ready for action whenever you need it. So how do you develop your own personal style of creative thinking?
You should realize that your brain has a greater capacity (容量) and a higher speed than the world’s biggest and fastest computer. So it’s important to get as much information as you can every day. Read, watch and listen to everything around you —good and bad. The more you know, the more you’ll want to know, and the more your brain will be exercised.
Try something new every day and let your experiences show you more about the world and people around you. You need to step out of your comfort zone (舒适地带) more and more each day.
Follow these suggestions, and begin thinking beyond your "limits" from today. You’ll soon have a life full of interesting and exciting adventures. Who knows, your idea might be the next great idea to change the world.
小题1:Most people can’t be creative geniuses because they _______. | A．don’t have great ideas | | B．don’t want to develop their ideas | | C．are too shy to talk about their ideas | | D．don’t believe they can be |
小题2:The underlined word "it" in the second paragraph means ________.| A．creative thinking | B．the muscle | C．personal style | D．great capacity |
小题3:What do we learn from the passage?| A．No computer can store as much information as human’s brain. | | B．It is not necessary to remember everything around you. | | C．Try something new, as long as you are comfortable with it. | | D．It is harder to exercise the brain than the muscles |
小题4:The passage is intended to tell readers _________.| A．how they can learn from creative geniuses | | B．about ways to develop their creative thinking | | C．about the importance of exercising the muscles | | D．the reasons why they can’t be creative geniuses |
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Do you like seahorses? What do you know about them?
The seahorse is actually not a horse but a fish, and much smaller than any regular horse. In general, a seahorse is about an inch long. It is a beautiful fish that likes warm waters, swims upright (直立的), and looks a little like a chess piece.
Seahorses are an unusual kind of animal because the males (雄性) give birth to babies. Mating (交配) takes place in cooler waters on spring and summer nights with a full moon. The females (雌性) put their eggs into the bodies of the males, and the males give birth to baby seahorses.
The seahorse can use each eye separately, which allows it to search for food without moving the rest of its body. Seahorses situate themselves near deep, fast-running channels rich in plankton, a kind of life on which they feed. They can catch food from an inch and a half away. Seahorses can change from gray or black to yellow or purple within seconds to fit in with their surroundings, and in this way escape from most of their enemies.
One of the surprising facts about seahorses for most people is that they are vertebrates (脊椎动物). They can turn and curl freely, and like to swim in pairs connected by their tails. Their tails are powerful, and they can use them to grasp the surrounding seaweed (海藻) to keep themselves from being swept away. So seahorses are usually found in warm water filled with seaweed.
Now that you know all these facts about seahorses, don’t you find them more interesting?
小题1:We can learn from the passage that seahorses _______.| A．are beautiful, and live on seaweed | | B．are as big as regular horses | | C．live near deep channels | | D．like to be alone |
小题2:The third paragraph tells us that _______.| A．male seahorses lay eggs | | B．seahorses mate in spring or autumn | | C．male seahorses give birth to babies | | D．seahorses mate in warmer waters at night |
小题3:Which of the following protects seahorses from being eaten by their enemies?| A．Their fast speed of swimming. | | B．Their ability to change colours. | | C．Their unique eyes. | | D．Their strong tails. |
小题4:Which of the following can replace the underlined word "grasp"?| A．Eat. | B．Hold. | C．Make. | D．Handle. |
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