单选题.One (common) herb of the mint family is thyme, the (dried) leaves and flowering tops of which (is) used (to flavor) many different food.

单选题The oxygen of the atmosphere, (so) essential to (many of) forms of life, (represents) the accumulated product of over 3,500,000,000 years of photosynthesis (by) green plants.

单选题{{B}}Narrator{{/B}} Listen to a part of a conversation in an office.

单选题Tunas migrate long distances over all the world’s oceans and occupy tropical, temperate, and even some the cooler waters.

单选题Some claim (that vegetarian) diets may (to be) more healthful than a diet that (includes) meat, since they generally (contain) less fat and more fiber.

单选题Twenty thousand years ago a sheet of (ice) a thousand meters (thick) covered the coastal region (which) the cities of Vancouver and Juneau (now are) located.

单选题In 1908 Olive Campbell started writing down folk songs by rural people in the southern A B C Appalachian mountains near hers home. D

单选题Health: Dementia Professor: Depending on your age, you may, or may not know someone who ______, a progressive brain dysfunction that can ______ Alzheimer"s disease. As our society ages, ______ dementia is increasing, putting all kinds of stresses on families and medical care. With half of the world"s population over fifty, and often ______ older parents suffering from dementia, not surprisingly there is a lot of interest in this tragic condition. Each person will experience dementia in his or her own way, but there will usually be ______ and communication skills. The person may ______ and not themselves. However, if this forgetfulness continues and results in ______, then there is clear cause for concern. Studies show that people don"t really have to start worrying about signs of ______ until they are around 65. By the time people are in their mid-80s ______ what was just said ______ or where they left the car keys can increase by 20%. ______, one out of every three people who make it to 90 will probably be suffering from moderate to severe dementia. The science that gave better medicine and food, thereby increasing the ______ from 65 to 80 years in the last century, and in women, 82, is also discovering drugs and therapies to treat dementia. For example, drugs are already ______ some people in the early to middle stages of Alzheimer"s disease. ______ or at best stabilize it. However, don"t expect the person ______ to go for testing. ______, or found out, is paralyzing and the shame of losing your marbles ______. Both the sufferer and the ______. Therefore, diagnosing dementia is very complicated, requiring input and observation ______, but the circle of family and friends. Testing involves questionnaires, blood tests and brain scans. One of the most public cases of Alzheimer"s was the death of ______, Iris Murdoch in 1999. Her decline was first captured in a book by her husband and then on screen in 2001 by actors Kate Winslet and Judy Dench. One movie scene was particularly illuminating because you actually saw the disease when her husband looks at the ______ of her brain. Anyway in this scene you see a healthy cross-section of a brain cortex, ______, and then Iris"s with all the convolutions or ______ —nothing—it"s totally erased. This brilliant mind has been completely erased by the disease. These lines are information highways and when they disappear, ______ memory. Dementia is a cruel, cruel disease where the individual is still in a healthy body, but ______. Imagine not having a mind, not remembering where one was one instant and what happened ______. One gerontologist likened it to living in a room with no doors and no windows, no escape, no sense of time. A mental prison that the ______ to because he or she can"t remember. But take heart, the brain is a muscle and studies prove that ______, the heart, the brain also ______ and proper diet. While genetic propensity has a lot to do with chances of outwitting this life stalking disease, so do mental and physical habits, all through life, but more so in mid-life. This could explain why today"s boomer generation is busy doing ______ like crossword puzzles and playing bridge, as much as they"re jogging and counting carbohydrates. ______.

单选题In 1796 investigations into the chemical nature of diamond concluded ________a form of pure carbon.

单选题A most useful tool for analyzing the elemental composition of fossils is the electron probe, a modify electron microscope.

单选题Which of the following will cause density within the glacier to increase?

单选题There were once only eight major lakes or reservoirs in Texas, but today there are over 180, many built to storing water against periodic droughts.

单选题Modern skyscrapers have a steel skeleton of beams and columns ___a three-dimensional grid.

单选题Of all the art-related reference and research (library) in North America, (that of) the Metropolitan Museum of a Art in New York City is (among) the largest and (most complete).

单选题Listen to Track 75. A. To compare an unfamiliar object to a familiar one B. To reveal evidence that contradicts his point C. To indicate uncertainty as to what deposits from glaciers look like D. To encourage students to examine rocks in streams

单选题It can be inferred from the passage that the nucleus of a comet is made up of

单选题The word "load" in line 23 is closest in meaning to

单选题Law: Law in America Professor: While America ______, that is, from 1607 to 1776, those who were interested in ______ had to go to England and attend Inns of Court ______. These inns were far from schools, but were ______ the English law society and helped students ______. It was common for people who wanted to be lawyers to ______ with somebody already established in the legal world. Once America became the United States of America, independent from the British, the rules and regulations for becoming a lawyer were ______ and the number of people who became lawyers ______. The most common way for somebody to ______ was by apprenticeship, but ______, law schools were established at various law offices ______. The first school was Litchfield School in Connecticut in 1784 and focused on commercial law. Colleges slowly ______, but it was not until 1817 that Harvard University established the first independent law school. From 1850 to 1900, the number of law schools grew from 15 to 102. These schools did not require that students already ______ when entering and it was ______ for the program to be completed in one year. However, in the late 1800s, there were more and more 2-year programs. The teaching of law ______ in 1870 at Harvard University. Students who did not already have an undergraduate degree ______. By 1871 the course was two years long and by 1876 it was three years long. At the end of the first year, there was a ______ that had to be passed if a student wanted to continue on to the next year of study. The most dramatic change, which is still in practice today, is the way teaching was done. ______, students studied cases. From the cases that were studied, students were expected to understand the ______, what they meant and how they developed. Teaching followed the ______, so students would discover the foundation of the laws ______. As the need for more lawyers grew by the late 1800s, the number of law schools that opened also grew. ______ to open a law school and as a result, several opened. There were even night schools for studying law, ______ as teachers. A problem with many of the schools that opened is that the standards were low and the material studied ______ what was customary in a specific region. The most important contribution of this is that studying law became available to everybody, not just ______. By the turn of the century, there was a dramatic increase in the number of people studying law. By 1960 schools ______ in who they permitted entrance. ______, law schools began to ______ students. The curriculum was changing too. ______, along with international law was being taught.

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