"Confidence" is probably one of the most noticeable traits in the Americans. They show confidence in the way they talk, the way they smile, the way they dress and the way they walk. Living and competing with all these confident American students, I find it extremely important to be confident as an international student and instructor. As a student, being confident means you should never hesitate to raise your hand whenever a question or a point comes to your mind. Don't mind if it sounds simple or silly. Otherwise you will never get a chance to speak in class at all. What's worse, the professors may think you are not prepared for the discussion or you do not have your own opinion on the issue--this is the last comment any graduate would like to receive. Being confident for me as a foreign instructor means calmly asking the student to repeat what he or she has said if I did not get it. Pretending to understand what you actually did not may just bring yourself embarrassment or even disgrace. But the time I most need to be confident is when my students come to my office and bargain about the grades I have given for their speeches. (The course I'm teaching here is Public speaking). Modesty is a trait highly valued in China, but it won't be of much help here if you want to survive and succeed in a good American graduate program. A professor will have the worst opinion of a student who _ . A) gives a silly or simple answer B) tries to seize any chance to speak in class C) shows no interest in the course D) is considered to have no opinion of his own
D
Traffic Management Traffic lights are key tools for regulating traffic How.They are not, however, perfect.Drivers exchange the traffic jams that would happen at unmanaged crossings for a pattern of stop-go movement that can still be annoying, and which bums more fuel than a smooth passage would. Creating such a smooth passage means adjusting a vehicle's speed so that it always arrives at the lights when they are green.That is theoretically possible, but practically hard.Roadside signs wired to traffic lights can help get the message across a couple hundred metres from a crossing, but such signs are expensive, and are not widespread.Margaret Martonosi and Emmanouil Koukoumidis at Princeton University, and Li-Shiuan Peh at the Massachusetts Institute of Technology, however, have an idea that could make the process cheaper and more effective.Instead of a hardwired network of signs, they propose to use mobile-phone applications. For a driver to benefit, lie must load the team's software , named SignalGuru, into his phone and then put it on a special thing attached to the inside of his car's windscreen, with the camera lens pointing forward.SignalGuru is designed to detect traffic lights and track their status as red, yellow or green.It broadcasts this information to other phones in the area that are fitted with the same software, and --if there are enough of them ?the phones thus each know the status of most of the lights around town.Using this information, SignalGuru is able to calculate the traffic-light schedule for the area and suggest the speed at which a driver should travel in order to avoid red lights. Tests in Cambridge, Massachusetts, where five drivers were asked to follow the same route for three hours, and in Singapore, where eight drivers were asked to follow one of two routes for 30 minutes, revealed that SignalGuru was capable of predicting traffic-light activity with an accuracy of 98.2% and 96.3% respectively, in the two cities.This was particularly impressive because in Cambridge the lights... The tests in Cambridge and Singapore were impressive because SignalGuru _ . A) proved to be unreliable B) operated at a high speed C) functioned rather stably D) understood drivers' schedules
C
Q: C "Over the years the unthinkable has become thinkable and today we sense we are close to being able to alter human heredity ." These were the words of David Baltimore of the California Institute of Technology,on December 1st,when he opened a threeday meeting in Washington to discuss the morality and use of human gene editing.Dr Baltimore is an old hand at these sorts of discussions,for he was also a participant in the Asilomar conference,in 1975,which brought scientists together to discuss a safe way of using the thennew technology of recombinant DNA,and whose recommendations influenced a generation of biotechnology researchers. Four decades on,the need for a similar sort of _ has arisen.The International Summit on Human Gene Editing has been held by the national scientific academies of three countries--America,Britain and China.They are particularly concerned about whether gene editing should be used to make heritable changes to the human germ line,something Dr Baltimore described as a deep and troubling question.Like those of Asilomar,the conclusions of this meeting will not be binding.But the hope is that,again like Asilomar,a mixture of common sense and peer pressure will create a world in which scientists are trusted to regulate themselves,rather than having politicians and civil servants do it for them.The meeting is being held against a backdrop of rapid scientific advance.Since 2012 research into a new,easytouse editing tool called CRISPRCas9 has blossomed.This technique involves a piece of RNA (a chemical messenger,which can be used to recognise a target section of DNA) and an enzyme called a nuclease that can snip unwanted genes out and paste new ones in. Public interest was aroused in April,when Chinese scientists announced they had edited genes in nonviable human embryos,and again in November when British researchers said they had successfully treated a oneyearold girl who had leukaemia ,using geneedited Tcells.Tcells are part of the immune system that attack,among other things,tumour... This passage is most probably a _ . A) science fiction B) scientific report C) conference summary D) commercial advertisement
A: B
(Question)
Traveling by bicycle is a very popular means of transportation throughout China. China has a huge population, and it is said that there is at least one bicycle for every two people within the country. Of course, many people in China ride bicycles purely for sport or exercise, but it's also a much more commonly accepted means of everyday transportation, as compared to countries such as the United States. If you are living for a long period of time in China, chances are you will want to purchase your own bicycle so that you can use it whenever you want for transportation or just for the enjoyment of riding. Even if you don't use a bicycle for everyday transportation, owning one can be a great way of enjoying some of the trails in the rural areas, just for fun. However, if you are just visiting China, renting a bicycle can be a more convenient choice. It is important to choose the correct bicycle for your use. You'll find that in China, the one-speed style of bicycle is extremely popular. These bicycles are great if you want to ride around in the city to see the sights. They are quite comfortable and easy to ride. You can often rent a bicycle for an entire day for around $15. However, if you wish to ride on some of the rural paths, a mountain bike style would be a better choice. They are great for different kinds of road surfaces, providing for a safer ride. If you are planning to have a desire to tour and still be able to carry packages with you, then a touring bike would be the best choice. These are generally the most expensive to rent, but are extremely handy for carrying packages and even some of your luggage along with you. You would like to own a touring bike probably because _ . A) you have to ride on the road in the countryside B) you have some packages to carry while traveling C) you want to enjoy the sights in the big cities D) it is suitable for all kinds of road surfaces
(Answer)
B