to release his energies

A . commence B . generate C . give D . have

A . currently B . fast C . readily D . instantly

A . Deferred B . Transient C . Concurrent D . Disruptive

A、did bring B、does bring C、did get D、does get

A . Impeller B . Electric motor C . Volute D . Eye

A . POWER7 servers running AIX 5.3 operate in POWER5+ mode. B . POWER7 servers running AIX 5.3 operate in POWER6 and POWER6+ mode. C . POWER7 servers running AIX 5.3 operate in POWER5 and POWER6 modes. D . POWER7 servers running AIX 5.3 operate in POWER6 and POWER7 modes.

A . constant B . pulse C . high D . none of the above

A . vaporizes B . attacks caustically C . rises D . attacks corrosively

A . Reduction of friction B . Insulation of hot surfaces C . Lubrication of moving parts D . Elevation of cooler outlet temperature

A．2,400 B．1,200 C．200 D．3600 此题为多项选择题。

A Because bullocks have long been used by Indian people B Because bullocks walk slowly and are easy to control C Because there are few non-working bullocks in India D Because there is not enough oil in India

A) Primitive B) Exhaustible C) Cheap D) Unsafe

A.the burning of the fuel; medium shaft B.fuel spray; fresh air C.fuel; fuel spray D.the burning of the fuel; the burned gas mixture

The first major energy transition was from wood to coal. For many centuries people used wood as a primary source of energy. By burning wood people were able to heat their homes, cook their food, and produce basic items. Most early societies grew up near a sufficient supply of wood. The main advantage of wood was that it was easy to get and easy to bum. During the early 1800's, some towns and villages began to make a transition from wood to coal as a basic source of energy, because they found that coal generally burns longer and at a higher temperature than wood, and a long-burning and hot-burning fuel was badly needed for the machines that were being used at that time. Another advantage of coal was that there was a lot of it and it was also easy to get. Besides, it could be easily shipped to faraway places. As a result of the transition from wood to coal, industry developed very rapidly. People were able to get more things and their standard of living went up. The second major energy transition was from coal to oil. We'll discuss it next week. Why did most early societies grow up near a sufficient supply of wood？ A．Because wood was safer than coal. B．Because wood burned longer than coal. C．Because there was more wood than coal. D．Because they used wood as primary source energy.

A．gave B．caught C．turned D．paid

By this time, the World War II had ended in Europe. But the Japanese refused to surrender, the Americans decided that by dropping an atomic bomb on Japan, they could end the war quickly and save more of their soldier’s lives. Soon after midnight on 6 August 1945, a bomb was dropped on the city of Hiroshima, a civilian target. No warning was given and there was total devastation. Almost all the buildings were destroyed and more than 100000 people died or were horribly wounded. The Japanese military still did not want to surrender so three days later, the Americans dropped a second atomic bomb on the city of Nagasaki, killing 45000 people. The Japanese government was discussing ending the war when they heard the news of Nagasaki. Finally, they surrendered and the World War II came to an end. At first, the scientists who had built the bomb were pleased that it had helped to end the war. However, many would come to realize that they had helped to create the most terrible weapon known to man. The first atomic bomb ______. A．was less powerful B．was dropped in Nagasaki C．was a failure D．was tested in desert

A．energies B．update C．making D．as possible

"There is no excuse for this, "President Bill Clinton had already chided." These results are, entirely unacceptable, "admonished the secretary of education. The head of the National Education Association declared U.S. schools to be in a state of crisis. And now Alberts, president of the National Academy of Sciences, said that he, too, saw in this report "all the elements of an education tragedy." "Americans have always risen to a crisis," he added. "We see clearly that the future is threatened. 2. Let us act now to heed this important wake-up call." And so, with editorial writers and educators across the country obligingly sounding the alarm, American education lurched yet again into crisis mode. It is a cyclical ritual, repeated in every decade since the 1940s, observes Gregory William of the University of Toledo. 3. The launch of Sputnik in 1957 set off an orgy of anxiety culminating in Admiral Hyman Rickover's 1963 book American Education, A National Failure, in which he famously predicted that "the Russians will bury us" thanks to their more rigorous science and math courses. 4. Beginning with the 1983 publication of A Nation at Risk, one blue-ribbon panel after another warned that massive educational failure had ceded the United State's technological lead to Japan and other competitors—a conclusion that proved premature. 5. Although the particulars vary from one education crisis to the next, the episodes are connected by common threads. Each has surged into public discourse on an unrelenting torrent of angst flowing from the educational research profession, William says. Combing through the education literature of the past 30 years, he recently turned up more than 4,000 articles and books in which scholars declared some sort of crisis in the schools—but rarely bothered to spell out what cataclysm was imminent. Each episode has also eaten away at public confidence in schools, which fell 38 percent from 1973 to 1996, according to surveys by the National Opinion Research Center.

A．stopped off B．gave in C．dropped out of D．pulled up