考研英语二阅读新题型 考研英语二10-14年真题阅读新题型.doc

1 考研英语二阅读新题型考研英语二 10-14 年真题阅读新题型 2010 年英语二 Reading-Part B Directions : Read the following text and decide whether each of the statements is true or false. Choose T if the statement is true orF it the statement is not true. Mark your answers on ANSWER SHEET1.(10 points) Copying Birds May Save Aircraft Fuel Both Boeing and Airbus have trumpeted the efficiency of their newest aircraft, the 787 and 350 respectively. Their clever designs and posites certainly make a difference. But a group of researchers at Stanford University, led by Ilan Kroo, has suggested that airlines could take a more naturalistic approach to cutting jet-fuel use and it 2 would not require them to buy new aircraft. The answer, says Dr Kroo, lies with birds. Since 1914, scientists have known that birds flying in formation-a V-shape-expend less energy. The air flowing over a bird ’s wings curls upwards behind the wingtips, a phenomenon known as upwash. Other birds flying in the upwash experience reduced drag, and spends less energy propelling themselves. Peter Lissaman, an aeronautics expert who was formerly at Caltech and the University of Southern California, has suggested that a formation of 25 birds might enjoy a range increase of 71%. When applied to aircraft, the principles are not substantially different. Dr Kroo and his team modeled what would happen if three passenger jets departing from Los Angeles, San Francisco and I as Vegas were to assemble over Utah, assume an inverted V-formation occasionally change places so all could have a turn in the most favorable positions, and proceed to London. They found that the aircraft consumed as much as 15% less fuel (coupled with a reduction in carbon-dioxide output). Nitrogen-oxide emissions during the cruising portions of the flight fell by around a quarter. 3 There are, of course, knots to be worked out. One consideration is safety, or at least the perception of it. Would passengers fortable travelling panion? Dr Kroo points out that the aircraft cou