单选题The American zoologist Dian Fossey conducted field studies of wild gorillas that disproved old beliefs that gorillas were violence and aggressive.

单选题The phrase "this regionalization scheme" in line 19 refers to the

单选题In the late 1800's ,United States painter Thomas Eakins (develop) a (broad) ,powerful Realist (style that) became (almost) expressionistic in his later years.

单选题Philosophy tries (to discover) the nature of (true) and knowledge and to find (what is) of basic value and (importance) in life.

单选题Cities differ from towns in the size, density, and diversity of their population. The city offers a wider variety of goods and services, as well as more extensive employment and cultural opportunities. City life is characterized by impersonal and formal social relationships, greater privacy, and more lifestyle choices--a way of life referred to as urbanism. The urban spirit is sophisticated and dynamic, stimulating the mind through contrasts and encouraging tolerance of differences. However, urbanism is not restricted to city dwellers; it can be considered a trait of all modern societies at a high level of technological development. The urban spirit spreads beyond the city via the mass media: television, movies, music, and the Internet. 6. Which sentence below best expresses the essential information in the highlighted sentence in the passage?

单选题What is the lecture mainly about? A. How ancient rivers created deserts B. How scientists work in the desert C. How to walk on sand dunes D. How sand dunes shift position

单选题In a stock company, a troupe of actors performs in a particular theater, presenting plays from its repertory of prepare productions.

单选题Some advantages of celluloid are that it is inexpensive and durable, takes a highly A B C polish, does not warp or discolor, and is not affected by moisture. D

单选题The word "intriguing" in line 5 is closest in meaning to

单选题Statistics indicate that approximate every 22 years--within a range of 3 to 4 years--a major drought occursin the United States.

单选题The major (economic) activities of Cheyenne, Wyoming, (include) transportation, (chemicals), tourism,(but) governmental activities.

单选题Which of the following questions does the passage mainly answer?

单选题(Many folk songs) were originated to accompany (manual) work (or to) mark a specific (ceremonies).

单选题In his animated films, Walt Disney created animals that talk and act like people while retaining its animal traits.

单选题The term "ice age" refers to any of several periods of time when glaciers covered considerably more of Earth's surface...... (a)as is today (b)than today is (c)than they do today (d)that today

单选题Strange Victory, Sara Teas dale's smallest and most perfect collection A B of poems, appear in print in 1933. C D

单选题The word "they" in line 17 refers to

单选题Bacteria are one of the most abundant life forms on Earth, growing on and inside another living things, in every type of environment.

单选题The word "insignificant" in line 16 is closest in meaning to

单选题Tornadoes Tornadoes, or twisters, are nature"s most violent storms. 1) The United Kingdom experiences an average of 32 tornadoes each year, which is the highest frequency of reported tornadoes per unit area in the world. But the deadliest and most violent tornadoes occur in the United States. Here they are most common in Oklahoma and Texas, an area otherwise known as Tornado Alley due to the frequency and severity of these phenomena. Tornado Alley stretches from central Nebraska southward to Central Texas. Each tornado is unique, and as such none is of the same size as the other, but on average each is between 130-170 meters wide and can travel up to 90 kilometers per hour. Tornadoes can last several minutes at a time and leave behind a path of destruction a couple of kilometers long. Some tornadoes can last up to three hours causing damage as far as 300 kilometers away, with winds of more than 400 kilometers an hour. Thankfully, though, these types of tornados are very rare. The word tornado comes from the Spanish "tronada" meaning thunderstorm and "tornar" meaning to turn. Virtually all tornadoes develop out of thunderstorms. 2) They form where warm, moist air and cold, dry air meet and create upward currents of air that develop into massive rotating cumulonimbus clouds. The center of the tornado"s vortex is a low-pressure area. When air rushes into the vortex, its pressure lowers and cools the air, condensing water vapor in the air into the funnel-shaped cloud. Depending on the type of debris it accumulates along the way, the color of the funnel varies between white, red, black and other shades. A funnel cloud refers to any rotating column of air growing from the base of a cloud. It will become a tornado if its circulation reaches the ground, so most of the visible funnel clouds are tornadoes. Tornadoes usually occur in the afternoon and early evening and they wreak destruction when they touch the ground. Most tornado deaths are related to building collapse, collisions by flying objects or failure to escape the tornado in a car. The average annual mortality rate in the U.S. due to tornadoes is about 42, but 1998 will be remembered as one of the worst years for tornado damage across the USA since around 100 people lost their lives in tornado incidents across many states. In May 1999, the Oklahoma City tornado was the deadliest in over 20 years, with more than 30 direct fatalities. But the number of tornado deaths per year has generally been much less in the last quarter of the 20th century than it was in previous ones. 3) Improved observation systems, communications and networks have all likely provided a significant decline in the life-threatening consequences of tornadoes. 4) Still the most accurate observation method for tornadoes is direct tracking. Thus, geologists are likely to be on standby should a tornado prove imminent. They would send a couple of scientists out into the open field for live tornado surveillance and direct their actions by microphone from a nearby computerized control area. The tornado surveyor stays locked in their car and records the tornado"s speed and movement as it happens onto a special log. Measurement is then later processed in the lab to form accurate prediction patterns for future tornados in the area. Glossary thunderstorm: a transient, sometimes violent storm of thunder and lightning, often accompanied by rain and sometimes hail cumulonimbus: a dark cloud of great vertical extent charged with electricity: associated with thunderstorms funnel: a conical shape with a wider and a narrower opening at the two ends mortality rate: the ratio of deaths in an area referred to the population of that area