WASHINGTON----Chinese Vice-President Xi Jinping arrived at Andrews Air Force Base in Washington,February 13,2012.Vice-President Xi Jinping said he would explore important problems in an active and practical manner with his America hosts on Monday during his five-day official trip here after arriving at Andrews Air Force Base in the afternoon. In a written statement given upon his arrival,Xi said as the international situation experiences complex and complete changes,China and the United States have more extensive common interests and shoulder more important common responsibilities on the present world stage. The purpose of the current visit is to "carry out the important _ reached by President Hu with President Obama during his visit to the United States in January last year and to advance the building of the China--US cooperative partnership based on mutual respect and mutual benefit",said Xi. According to Xi,bilateral relations have moved forward in spite of some twists and turns during the past several decades. "This has brought enormous benefits to our two countries and two peoples,and has had a positive, far-reaching impact on peace,stability and the prosperity of the Asia-Pacific region and the world at large". Xi said that"whether we can seize opportunities,tackle challenges and build a cooperative partnership at the new historical starting point matters to the future of our two countries and the world as a whole." Xi said he looks forward to engaging in extensive dialogue and exchanges with Americans from various sectors to enhance cooperation and strengthen friendship. Xi is scheduled to meet US senior government officials,including Henry Kissinger,Brent Scowcroft,Zbigniew Brzezinski,Madeleine Albright and Henry Paulson this evening to listen to their advice on China-US ties. Meetings between Xi and US Vice-President Biden and President Obama are scheduled on Tuesday. According to tile passage,bilateral relations between China and US have experienced _ . A) enormous dialogues B) extensive exchanges C) rnany challenges D) various hardships
D
Air traffic controllers in the US have been advised to take 26-minute naps , after a series of accidents involving workers falling asleep. Now the National Transportation Safety Board (NTSB) is calling for "controlled naps" during nightshifts . NTSB member Mark Rosekind said that a 26-minute nap would improve performance by 34%. He believes that beyond the aviation industry, other professions, such as motoring and machinery, also carry obvious risks. But other experts doubt whether 26 minutes is the appropriate napping time. It's a bit too long and risks you falling into a deep sleep, says Jim Horne, director of the Sleep Research Council. He said, "A nap of about 15 minutes is best; once you get beyond 20 minutes, you risk a deep sleep and you can be much more tired when you wake up. Therefore, we suggest that a nap be combined with a cup of coffee so that you can enjoy an effective sleep before the caffeine takes effect in 20 minutes. However, this method only works on those who have had a poor night's sleep. If you haven't had a sleep the night before, this method won't be enough to make you fresh." Health writer, Linda Wasmer Andrews, also believes that 26 minutes is too long. She says a nap between 10 and 20 minutes is enough, and the timing of the nap is also important. Putting your head down too early means your body may not be ready to sleep yet, but a nap that is too late in a day might make it harder to fall asleep. Early afternoon is often the best time, between l pm to 3pm, when people experience a post-lunch decrease in energy. What does the text mainly talk about? A) People who need a nap. B) How long a nap should last. C) When people should take a nap. D) The reason why people need a nap.
B
Q: I told my friend Graham that I often cycle two miles from my house to the town centre but unfortunately there is a big hill on the route. He replied, "You mean fortunately." He explained that I should be glad of the extra exercise that the hill provided. My attitude to the hill has now changed. I used to _ as I approached it but now I tell myself the following. This hill will exercise my heart and lungs. It will help me to lose weight and get fit. It will mean that I live longer. This hill is my friend. Finally I comfort myself with the thought of all those silly people who pay money to go to a gym and sit on stationery exercise bicycles when I can get the same value for free. I have a smile of satisfaction as I reach the top of the hill. Problems are there to be faced and overcome. We cannot achieve anything with an easy life. Helen Keller was the first deaf and blind person to gain a university degree. Her activism and writing proved inspirational. She wrote, "Character cannot be developed in ease and quiet. Only through experiences of trial and suffering can vision be cleared, ambition inspired and success achieved." One of the key factors of success in life is our attitude towards adversity . From time to time we all face hardships, problems, accidents, afflictions and difficulties. Some are of our making but many confront us through no fault of our own. While we cannot choose the adversity we can choose our attitude towards it. Douglas Bader was 21 when in 1931 he had both legs cut off following a flying accident. He was determined to fly again and went on to become one of the leading flying aces in the Battle of Britain with 22 aerial victories over the Germans. He was an inspiration to others during the war. He said, "Don't listen to anyone who tells you that you can't do this or that. That's nonsense. Make up your mind, and you'll never use crutches or a stick, and then have a go at evening. Go to school, and join in all the games you can. Go anywhere you want to. But never, never let them persuade... Following this passage, the author will further talk about _ . A) how his friend helped him to change his attitude towards the adversity he faced B) what steps to take to change your attitude towards the adversity you face C) what great people have in common D) why it is important to keep optimistic in face of adversity
A: B
(Q).
Edward Wilson is America's, if not the world's, leading naturalist. In The Future of Life, he takes us on a tour of the world's natural resources. How are they used? What has been lost? What remains and is it able to continue with the present speed of use? Wilson also points out the need to understand fully the biodiversity of our earth. Wilson begins with an open letter to the pioneer in environment protection, Henry David Thoreau. He compares today's Walden Pond with that of Thoreau's day. Wilson will use such comparisons for the rest of the book. The problem is clear: man has done great damage to his home over the years. Can the earth, with human help, be made to return to biodiversity levels that will be able to support us in the future? Biodiversity, Wilson argues, is the key to settling many problems the earth faces today. Even our agricultural crops can gain advantages from it. A mere hundred species are the basis of our food supply, of which but twenty carry the load. Wilson suggests changing this situation by looking into ten thousand species that could be made use of, which will be a way to reduce the clearing of the natural homes of plants and animals to enlarge farming areas. At the end of the book, Wilson discusses the importance of human values in considering the environment. If you are to continue to live on the earth, you may as well read and act on the ideas in this book. How many species are most important to our present food supply? A) Twenty B) Eighty C) One hundred D) Ten thousand
(A).
A