单选题In the early 1900’s, Roy Harris created and promoted a distinctly American style of classical music and greatly influenced a number of composer in the United States.

单选题Some colonies of bryozoans, small marine animals, form ___with trailing stems.

单选题According to the passage, acidic soils tent to be associated with

单选题The "white chalk cliffs of Dover" are mentioned in line 14 of the passage to

单选题Employees may receive 50% tuition reimbursement for job-related courses taken with a supervisors .

单选题The rapid growth of the world’s population over the past 100 years have led to a great increase in the acreage of land under cultivation.

单选题The word "evolution" in line 12 is closest in meaning to

单选题The music called "blues" has deep roots in African-American history. In the Mississippi Delta, men working in the cotton fields and on construction crews chanted and sang as they worked. These work songs and "field hollers" expressed the pain and sorrow of the workers and helped to pass the time. During the evenings, the workers sang these songs, accompanied by guitar and banjo. Live dance bands started playing blues songs, and female singers further developed the style. The blues spread from its birthplace in the Mississippi Delta to other rural areas of the South. Eventually, the music traveled northward with African Americans who moved from the South to cities in the North. The blues contributed to the development of other types of music, such as the big-band jazz of the 1930s.

单选题A water molecule consists of two hydrogen atoms attached to a single, larger oxygen atom. The angle between the two hydrogen atoms is 120 degrees--the same angle as the angles of a hexagon--which accounts for the characteristic six-sided structure of ice crystals. 2. The phrase accounts for in the passage means

单选题Alamo Erected in 1722 as a Franciscan mission and later used as a fort, the Alamo is now a state monument and popular tourist attraction. Located in San Antonio Texas, the Alamo has great historical importance, as it was the site of a pivotal battle in Texas" war of independence against Mexico. The lore surrounding the Alamo continues to fascinate people to this day. In 1995, excavators began digging on the grounds of the monument in the search for gold which was supposedly dropped down one of the wells during the course of battle. The battle that was to take place at the Alamo reaches far back in history. During the 18th century, Texas formed an integral part of the Mexican state. In fact, both U.S. states bordering Mexico to the north, namely Texas and New Mexico, were part of the Mexican country. Strong economic ties had developed between both nations, mainly due to the booming cattle industry. Texan ranchers provided the raw beef meat that was to be shipped in huge refrigerated cars further north towards the meat processing plants in Chicago and Detroit. At that time, white Americans and swarthy Mexicans cohabitated peacefully the Texan lands. These prosperous times were to be shattered by the emergence on the political scene of dictator General Santa Anna. Santa Anna was a vain and ruthless man, who had wrestled control away from the Mexican government and instituted a regime of brute terror. Any Mexican citizen was to be at his every beck and call, including the well-off Texan ranchers. Of course, that situation did not sit well with the proud Texans, whether of American or Mexican origin. No sooner did they realize that the state was falling into the claws of a usurper, they strived to set themselves free. A handful of resolute freedom fighters declared Texas" independence from Mexico and set up an independent democratic government. Santa Anna responded by mobilizing his army and marching towards insurgent Texas. Thus, both sides were set for armed combat . On February 23, 1836 Mexican general Antonio Lopez de Santa Anna led a Mexican force of more than 2000 men in an attack on the San Antonio garrison. Texan insurgents led by Colonel William Barrett Travis had captured the garrison the previous December. With the attack by Santa Anna, the Texan forces, who were composed of 155 soldiers and 15 civilians, withdrew to the Alamo. Santa Anna deployed his troops around the structure and launched an intensive assault. The Texans received reinforcements of 32 men on March 1 and withstood the Mexican attack until March 6, when the walls of the Alamo were breached. Colonel Travis, his chief aides—who included the frontiersmen Davy Crockett and James Bowie—and the remainder of the garrison perished in the fierce battle that followed. All 187 Texan defenders were killed, but the lives of the 15 civilians were spared. The battle over the Alamo was a bitter struggle for both sides and was not quickly forgotten by the Texans. In the subsequent Battle of San Jacinto, the rallying cry of the Texans was "Remember the Alamo!", and in this contest they succeeded in defeating Santa Anna and his forces. Glossary Franciscan: a member of an originally mendicant religious order founded by St. Francis of Assisi in 1209 and dedicated to the virtues of humility and poverty. It is now divided into three independent branches. lore: knowledge gained through tradition or anecdote garrison: the troops stationed at a military post Texan: of or relating to or characteristic of Texas or its residents

单选题_____ one after another, parallel computers perform groups of operations at the same time.

单选题Listening5"ZoologyClass"

单选题1 A hot spot is a giant underground caldron of molten rock in one of the world's many volcanically active areas. The steamy~ geysers, thermal pools, and mud pots of Yellowstone National Park owe their origins to hot spots. 2 Annually, more than 200 geysers erupt in Yellowstone, making this one of the most interesting places in the world for geologists. Over 100 geysers lie within the Upper Geyser Basin, a one-square-mile area near Old Faithful, the most famous geyser in the world. The Yellowstone hot spot was created around ten million years ago, and the center of the park is still volcanically active, with molten rock only a mile or two beneath the Earth's surface. 3 When rain and melted snow seep down through tiny cracks in the Earth, the water eventually reaches underground chambers of lava-heated rock. The rock heats the water, and the boiling water and steam often make their way back up to the surface in the form of a geyser, a thermal pool, or a mud pot. 4 In a geyser, water trapped in an underground chamber heats up beyond the boiling point and forms steam. Since steam takes up 1,500 times more space than water, pressure builds up, eventually forcing the superheated water to burst to the surface as a geyser. A thermal pool is formed when the water from the hot spot reaches the surface before cooling off. If the water does not make it all the way to the surface, steam and gases may dissolve rocks and form a bubbling mud pot instead.

单选题Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points. In the future, clean cars are likely to be put into use to reduce the air pollution. ● ● ● Answer ChoicesA. Motavalli discussed this in his new book, with his sincere concern for the environment, and his refreshingly accurate knowledge of cars.B. 10 percent of all vehicles sold in the state are zero-emission vehicle—battery or fuel-cell electrics, not hybrids.C. Clean cars will soon replace normal cars for environmental protection reasons.D. Automakers in Detroit, Japan, and Europe are in a heated race to start selling cars that are more environmentally correct.E. The new, clean cars will emerge from the well-funded research labs of the major auto companies that initially fought their introduction.F. Technology is progressing faster than the book deadline allowed him to keep up with, and the first clean car will be likely to occur in the sports vehicles.

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单选题(Most) fish swim by (moving) their tails from (side to) side, with (little relatively) body undulation.

单选题The word "boosted" in line 3 is closest in meaning to

单选题Anatomy: The Brain Professor: ______ a picture of the human brain today, which we are going to look at and discuss in detail. The parts of the brain that we are going to talk about today are clearly labeled. The brain is like our command center ______ our environment. How we communicate with words, actions, thoughts, and feelings are all centered in the brain. Some researchers believe that the brain is so complex and mysterious that we will never be able to fully understand it. Some have ______ like those found on a plane that contain all the critical and highly confidential information of the flight. ______, there are parts of the brain that we do know about, ______, and we also know their functions that each bring to make our body work. It"s easiest to think of the brain as three connected parts: the cerebrum, brainstem, and cerebellum. Let"s start off with the brainstem, which is found ______ and joins the cerebrum to the spinal cord. The brainstem has an important role because it controls lots of critical functions including respiration, ______, basic aspects of sound localization, which allows us to ______, and reflexes. As you can see on the diagram, the brainstem includes the midbrain, the pons, and the medulla. ______ the movement of our eyes and mouth, ______ like hot, pain, loud, and other functions such as hunger, consciousness, body temperature, ______. Next, we"ll look at the second largest part of the brain—the cerebellum. It is located at the lower back of the head and ______. It is made up of two hemispheres and its functions are to control complex voluntary motor functions such as walking, balance and posture. The third and largest part of our brain is the cerebrum. Its associations are ______, movement and sensations such as touch, vision, hearing, judgment, reasoning, problem solving, and emotions. It is ______ controlling the opposite side of the body. The corpus callosum ______, and delivers messages between them. There are four lobes that make up the cerebrum, the frontal, temporal, parietal, and occipital. The frontal lobe is located in the front of the head and ______, characteristics and movement. The parietal lobe is in the middle part of the brain, and helps you to ______ like where your body is compared to objects around you. It also helps make meaning of pain and touch in the body. The occipital lobe allows you to see and is located ______. Finally, the temporal lobe ______ memory, speech, and sense of smell and is found at the sides of the brain. The average weight of the adult human brain is anywhere between 1 and 1.5 kilograms. Some people say that we only use 10% of our brain, but ______. In fact, we use our entire brain. That being said, we can claim that most people only use ______ of their brain. Different cultures have used several methods to ______ such as reading, education, puzzle solving and critical thinking. I hope this brief introduction to the brain helps you understand the brain and ______.

单选题It can be inferred from the passage that astronomy textbooks prior to 1979