Older fathers have uglier children, researchers have claimed after linking age to genetic mutations . The finding comes weeks after leading scientists reported children born to men over the age of 45 run a higher risk of having autism and mental disorders. With age, sperm -producing cells do not copy a man's DNA as effectively, leading to genetic mutations. Martin Fielder, an anthropologist at Vienna University, told the Sunday Times: 'Every 16 years the mutation rate doubles. Other researchers found 25 mutations per sperm in a 20-year-old, but at age 40 it is 65 mutations. By 56, it doubles again. The effect is very visible - someone born to a father of 22 is already 5-10 per cent more attractive than those with a 40-year-old father and the difference grows with the age gap. In contrast, women pass on a maximum of 15 mutations to their baby, regardless of age, according to the study published in the journal Nature. Surveying a group of six men and six women, researchers showed them each 4,018 photographs of 18-20-year-old men and 4,416 of women the same age, and asked to assess their attractiveness. Those with older fathers were consistently considered less attractive. However, the children of older men, though less attractive, are likely to outlive their peers with younger fathers, it is claimed. Professor Lee Smith, a geneticist at Edinburgh University, told the Sunday Times other research found such children have longer telomeres - the caps on the end of chromosomes --- which are associated with longer life. But the mounting research connecting parents' age with autism is cause for concern, experts warn. Autism is an umbrella term for a range of developmental disorders that have a lifelong effect on someone's ability to interact socially and communicate openly. In the UK, around one in 100 adults is thought to be affected by autism, mostly men, caused by a combination of genetic and environmental factors. Researchers said men should be advised about the potential problems in order to help their personal... The whole passage is developed mainly by means of _ . A) showing examples B) making arguments C) presenting theories D) providing data and facts
D
(Question)
China Daily Oct. 11----The ministry of Health has called for more awareness from the public on the mental health of the young, as part of efforts to make World Mental Health Day which fell on Friday. More than 15 percent of Chinese youths have been found with mental problems, and about 30 million young people under 17 are suffering from depression, the Shang-based Wenhui Daily reported. The World Health Organization estimates that before 2020, the rate of children with mental problems will increase to 50 percent, and mental problems will become a major factor behind deaths and illness in the young worldwide. Deng Xiaohong, the spokesperson for the Beijing Municipal Health Bureau, said rapid changes are one of the reasons behind the rising number of youngsters with psychological problems. If these mental diseases are not addressed on time, occurrence of crimes, drug-taking and other dangerous behavior are expected to rise. Experts said mental diseases could be caused by many factors, such as the inability to handle interpersonal relations well, unstable emotions and pressures from an overload of studies. A number of experts have also said the one-child policy is another reason leading to poor mental health in the young. Children are said to be too " spoiled" and "selfish" in a one-child family. It's reported schools in many cities are rolling out measures to help students maintain their mental well-being. Yin Jingmiao, a teacher of the Beijing No.105 Middle School, told China Daily that the school invites psychologists to provide counseling to students three times a month." Students can be arranged to have 40-minute counseling sessions," Yin said. The school also gives lectures on mental health to senior grade students before they take the national college entrance exams to help ease any anxiety arising from the tests. Which of the following can be the best title for the passage? A) Efforts to Mark World Mental Health Day B) Seriousness of Youngsters' Mental Health Problems C) How to Maintain Mental Well-being D) Public Awareness on Youngsters' Mental Disease Expected
(Answer)
D
Ques: I climbed Kilimanjaro with Lava Expeditions during the rainy season. I flew to Nairobi in Kenya and spent several days there. At my hotel in Nairobi I met the rest of the group with whom I would spend the next week. We all travelled on the bus together for a 6-hour journey into Tanzania and then Arusha , a quiet town. After we arrived at our hotel in Arusha , we had dinner and a few drinks. Then we were introduced to more members including Taddeus Minja, the main guide, who was very experienced -- climbing Kilimanjaro runs through the generations of his family. The next day the Lava Expeditions members checked if we had the correct and enough clothing for our expedition on Kilimanjaro. Only one person needed to bring more clothes. After that we set off, walking in the rain through the beauty of the rainforest, all the way to the first camp. I was happy the next few days as the view was so wonderful and changed every day. I suffered a little during the trip and I felt so tired. But the members of Lava Expeditions provided me with lots of encouragement, which was one of the best memories. Finally we reached the top of Kilimanjaro in bright blue skies. I felt excited about climbing Kilimanjaro and the feeling didn't change during my trip. Lava Expeditions looked after me so well that I was deeply thankful for their help. What did the author think of his climbing Kilimanjaro? A) Tiring and disappointing. B) Tiring but excited. C) Dangerous but exciting. D) Dangerous and tiring.
Ans: B
Ques: What could be cuter than your puppy giving his doggy friend a kiss on the nose? Nothing, really. But is your dog actual-fly planting a kiss on his friend? Yes, but that's only one of the reasons your dog may lick another dog's nose. Here are some other reasons why your dog may lick another dog's nose. During an introduction, a shy and lower-ranking dog will lower his head, avoid direct eye contact and gently extend his tongue to lick the nose of a more confident and high-ranking dog. The first dog licks the nose of the second dog to simply make it know that:he comes in peace. Dogs who are already friends will also trade kisses. Two strongly bonded dog pals will lick and clean each other. They give each other "dog kisses" showing friendship. Puppies also "kiss" their mothers, but it's not a gesture of love. When puppies stop suckling their mothers' tits for milk and start to eat semisolid food instead;they lick their mothers' mouths and noses in the hope of getting the mother to regurgitate some semi-digested food. So how to help your _ dog make friends with other dogs? You can carefully select confident-but-friendly and good-tempered dogs to play with your shy dog, to help him develop his social skills. Also consider taking him to a special training class that focuses on socialization and positive training technique. Do not disturb them when your two dogs play "kiss" briefly with each other. Sit back and enjoy this display of friendship. Then call them over and have them do a command such as "sit'' or "shake paws". Offer them treats as a reward for being good to each other. If you foster a dog and have three or more resident dogs, introduce the foster dog to your brood dog one at a time and let muzzle licking between them happen naturally. Start with your least reactive or most friendly dog. Never force an in production between the dogs because this can deepen the foster dog's submissiveness or spark a fight. What can we know about two dogs who are already friends? A) They seldom give each other kisses. B) They usually avoid direct eye contact. C) They like keeping their friendship a secret. D) They show their friendship by "dog kisses".
Ans:
D