复合题Directions: There are 15 blank in the following passage. For each blank there are four choices marked A), B), C), and D). Choose the ONE answer that best fits into the passage and write the corresp

复合题Directions: In the following text, some sentences have been removed. For Questions 【B1】 to 【B5】, choose the most suitable one from the list A—G to fit into each of the numbered blanks. There are tw

复合题Richard Satava, program manager for advanced medical technologies, has been a driving force in bringing virtual reality to medicine, where computers create a virtual or simulated environment for surgeons and other medical practitioners.“With virtual reality we’ll be able to put a surgeon in every trench,” said Satava. He envisaged a time when soldiers who are wounded fighting overseas are put in mobile surgical units equipped with computers.The computers would transmit images of the soldiers to surgeons back in the U.S.The surgeons would look at the soldier through virtual reality helmets that contain a small screen displaying the image of the wound. The doctors would guide robotic instruments in the battlefield mobile surgical unit that operate on the soldier.Although Satava’s vision may be years away from standard operating procedure, scientists are progressing toward virtual reality surgery. Engineers at an international organization in California are developing a tele-operating device. As surgeons watch a three-dimensional image of the surgery, they move instruments that are connected to a computer, which passes their movements to robotic instruments that perform the surgery. The computer provides feedback to the surgeon on force, textures, and sound.These technological wonders may not yet be part of the community hospital setting but increasingly some of the machinery is finding its way into civilian medicine. At Wayne State University Medical School, surgeon Lucia Zamorano takes images of the brain from computerized scans and uses a computer program to produce a 3-D image.She can then maneuver the 3-D image on the computer screen to map the shortest, least invasive surgical path to the rumor. Zamorano is also using technology that attaches a probe to surgical instruments so that she can track their positions. While cutting away a tumor deep in the brain, she watches the movement of her surgical tools in a computer graphics image of the patient’s brain taken before surgery.During these procedures—operations that are done through small cuts in the body in which a miniature camera and surgical tools are maneuvered—surgeons are wearing 3-D glasses for a better view. And they are commanding robot surgeons to cut away tissue more accurately than human surgeons can.Satava says, “We are in the midst of a fundamental change in the field of medicine.”

复合题In the wake of 11 September, Visionics, a leading manufacturer, issued a fact sheet explaining how its technology could enhance airport security. They called it “Protecting civilization from the faces of terror”. The company’s share price skyrocketed, as did the stocks of other face-recognition companies, and airports across the globe began installing the software and running trials.As the results start to come in, however, the gloss（ 光滑表面） is wearing off. No matter what you might have heard about face-recognition software, Big Brother, it isn’t.The concern was based largely on an independent assessment of face-recognition systems carried out in 2000 in the US by the Department of Defense. These tests found that to catch 90 per cent of suspects at an airport, face-recognition software would have to raise a huge number of false alarms. One in three people would end up being dragged out of the line—and that’s assuming everyone looks straight at the camera and makes no effort to disguise himself. Results from the recent airport trials would seem to justify that concern.Most face-recognition systems use some kind of geometric technique to translate a picture of a face into a set of numbers that capture its characteristics. Once it has identified these boundaries, the software calculates their relative sizes and positions and converts this geometry into what Visionics calls a “face print”. Feed the software a series of mug shots（通缉犯），and it’ll calculate their face prints. Then it can monitor live CCTV images for the faces of known suspects. When it finds a match, it raises an alarm.Even if the system does manage to capture a face, the problems aren’t over. The trouble is that a suspect’s face print taken from live CCTV is unlikely to match the one in the database in every detail. To give themselves the best chance of picking up suspects, operators can set the software so that it doesn’t have to make an exact match before it raises the alarm. But there’s a price to pay: the more potential suspects you pick up, the more false alarms you get. You have to get the balance just right.Despite the disappointing tests, some people insist that face-recognition technology is good enough to put terrorists off. After all the claims and counter-claims, with no one able to discern（洞察） the truth, the industry may soon have to face up to reality.

复合题Directions: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Write your

复合题Directions: There are 3 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A., B., C. and D. You should de

复合题Directions: There are 15 blanks in the following passage. For each blank there are four choices marked A, B, C, and D. Choose the ONE that best fits into the passage and write the corresponding let

填空题For this study, investigators analyzed the component of air pollution known as fine particulate matter (PM2.5)—the tiny pieces of solid or liquid pollution _____ from motor vehicles, factories, power plants, fires, and smoking.(emit)

填空题There has been no _____ to his remarks from the government. (respond)

填空题It seems that too many young folks in China are pressured into marriages they’re neither prepared for emotionally or mentally, nor are they prepared for it _____ (material)

填空题4. I was alarmed by his naivety and _____ of international affairs.（ignore）

填空题The physical world was and still is indifferent to the mathematicians’ _____. (classify)

填空题While a little _____ can keep you on top of your game, too much can destroy your confidence and ruin yourchances of success. (anxious)

填空题When having spring rolls, people eat the entire roll from one end to the other, _____ that everything in the coming year will end in success. (symbolize)

填空题7. The average daily _____ of fruit and vegetables is around 200 grams. (consume)

填空题For this study, _____ analyzed the component of air pollution known as fine particulate matter (PM2.5)—the tiny pieces of solid or liquid pollution emitted from motor vehicles, factories, power plants, fires, and smoking. (investigate)

填空题The _____ of the Chinese civilization comes from its millenniums-long cultural self-confidence and its continuous interactions among its own ethnic groups and with outside civilizations. (vital)

填空题The _____ were based on a systematic review and meta-analysis of studies dating back between 1982 and 2015,which evaluated relationships between egg intake and coronary heart disease (276,000 subjects) and stroke (308,000 subjects). (find)

填空题When we watch a world-class musician or a top athlete, we don’t see the years of preparation that _____ him or her to become great. (able)

填空题I was too _____ in my own problems and too uninterested in politics to remember that it was also a momentous day in Washington. (absorb)