单选题What is Mr. Estrada accused for?

单选题Which of the following determiners(限定词)can NOT be placed before both singular count nouns and plural count nouns?

单选题That trumpet player was certainly loud. But I wasn"t bothered by his loudness ______ by his lack of talent.

单选题{{B}}TEXT B{{/B}} The prefix Mach is used to describe supersonic speed. It was named for Ernst Mach (1838-1916), a Czech-born Austrian physicist, who contributed to the study of sound. When twice the speed of sound, it is Mach 2. When it is near but below the speed of sound, its speed can be designated at less than Mach 1. for example, Mach 90. Mach is defined as "the ratio of the velocity of a rocket or a jet to the velocity of sound in the medium being considered." When a plane passes the sound barrier-flying faster than sound travels' listeners in the area hear thunderclaps, but the pilot of the plane does not hear them. Sound is produced by vibrations of an object and is transmitted by alternate increase and decrease in pressure that radiate outward through a material media of molecules--somewhat like waves spreading out on a pond after a rock has been tossed into it. The frequency of sound is determined by the number of times the vibrating waves undulate per second and is measured in cycles per second. The slower the cycle of waves, the lower the frequency. As frequencies increase, the sound is higher in pitch. Sound is audible to human beings only if the frequency falls within a certain range. The human ear is usually not sensitive to frequencies of fewer than 20 vibrations per second, or more than about 20,000 vibrations per second--although this range varies among individuals. Anything at a pitch higher than the human ear can hear is termed ultrasonic. Intensity, or loudness, is the strength of the pressure of these radiating waves and is measured in decibels. The human ear responds to intensity in a range from zero to 120 decibels. Any sound with pressure over 120 decibels is painful to the human ear. The speed of sound is generally placed at 1088 feet per second at sea level at 32 degrees Fahrenheit. It varies in other temperatures and in different media. Sound travels faster in water than in air, and even faster in iron and steel. It travels a mile in 5 seconds in air, it does a mile under water in 1 second, and it travels through iron in 1/3 second. It travels through ice cold vapor at approximately 4,708 feet per second; ice-cold water, 4,938; granite, 12,960; hardwood, 12,620; brick, 11,960, glass. 16,410 to 19,690; silver, 8,658; gold, 5,717.

单选题After an exhausting tour, she fell into a heavy ______ and slept long and late.

单选题apply application bid proposal apply v. (1) to ask formally for something usually in writing We applied to the bank for a loan. I applied in writing to several different companies. (2) to put or spread (something) on a surface, a part of the body, etc. I washed my face and applied fresh makeup. (3) to use/can be used in a particular situation We can handle these problems effectively if we apply the lessons learned from past experiences. These rules apply to everyone in the school. apply oneself work hard in order to complete something successfully If you apply yourself, you might be able to finish the project on time. She applied herself to learning the language. application n. (1) a formal and usually written request for something If you'd like to be considered for the job, please send us a letter of application that gives your experience and qualifications. (2) the use of an idea, method, law, etc.; in a particular situation Strict application of the rules is necessary in this case. The technology of cell phone service has been working well for me at the office, but there are infinite applications. bid v. to offer a price for He plans to stop bidding if the bids go over $500. Several local companies are bidding for the same job. His company bid on the snow removal contract. bid up to raise the price Several antique dealers bid up the best lots to shut out less experienced bidders. proposal n. (1) a plan or suggestion presented to people to consider They put forth a proposal to sell the company. (2) the act of asking someone to marry you She accepted his proposal of marriage.The multi-national corporation was making a take-over ______ for a property company. A. application B. bid C. proposal D. suggestion

单选题The motive for scientific work is sometimes curiosity, sometimes ______, and sometimes the love for money.

单选题Please be careful when you are drinking coffee in case you ______ the new carpet.A. crashB. polluteC. spotD. stain

单选题The newly built school offers courses in every subject ______.

单选题From the passage we know that the nerve impulses in human beings ______.

单选题A tribe of Plains Indians, the Assiniboins, had the distinction of hunting on foot. During the winter months the hunters wore snowshoes to chase the buffalo into the deep snow, where the animals were easily killed, The Assiniboins were thrifty people who utilized all of their dead prey: the meat was their food; their clothing came from the hides; their tools and weapons came from the bones and horns. Once the other parts had been disposed of, the children used the buffalo's ribs as sleds.

单选题You should ______ yourself with the relevant facts before making a decision. A. acquaint B. acquire C. acknowledge D. attempt

单选题Which of the following is NOT included as the three concepts involved in the study of stress?

单选题What caused the prices of the telephone system to lower?

单选题Which of the following words can be used to complete the sentence " She cooks well ______. "? A. enough B. hardly C. rather D. entirely

单选题Historians may well look back on the 1980s in the United States as a time of rising affluence side by side with rising poverty. The growth in affluence is attributable to an increase in professional and technical jobs, along with more two career couples whose combined incomes provide a "comfortable living". Yet simultaneously, the nation's poverty rate rose between 1973 and 1983 from 11.1 percent of the population to 15.2, or by well over a third. Although the poverty rate declined somewhat after 1983, it was still held at 13.5 percent in 1987, comprising a population of 32.5 million Americans. The definition of poverty is a matter of debate. In 1795, a group of English magistrates decided that a minimum income should be "the cost of a gallon loaf of bread, multiplied by three, plus an allowance for each dependent". Today the Census Bureau defines the threshold of poverty in the United States as the minimum amount of money that families need to purchase a nutritionally adequate diet, assuming they use one third of their income for food. Using this definition, roughly half the American population was poor in the aftermath of the Great Depression of the 1930s. By 1950, the proportion of the poor had fallen to 30 percent and by 1964, to 20 percent. With the adoption of the Johnson administration's antipoverty programs, the poverty rate dropped to 12 percent in 1969. But since then, it has stopped falling. Liberals contend that the poverty line is too low because it fails to take into account changes in the standard of living. Conservatives say that it is too high because the poor receive other forms of public assistance, including food stamps, public housing subsidies, and health care.

单选题Smoking is so harmful to personal health that it kills ______ people each year than automobile accidents. A. seven more times B. seven times more C. over seven times D. more seven times