学科分类

已选分类 文学外国语言文学英语语言文学
填空题咫尺之隔,竟成海天之遥。南京匆匆一晤,瞬逾三十六载。幼时同袍,苏京把晤,往事历历在目。惟从常年未通音问,此诚憾事。近闻政躬违和,深为悬念。人过七旬,多有病痛,至盼善自珍摄。三年以来,我党一再倡议贵我两党举行谈判,同捐前嫌,共竟祖国统一大业。惟弟一再声言“不接触,不谈判,不妥协”,余期期以为不可。世交深情,于公于私,理当进言,敬希诠察。
进入题库练习
填空题My sister is ______ architect.
进入题库练习
填空题Though he did not d______, he went at a pace slow enough for the listeners to take down a lot of what he said.
进入题库练习
填空题
进入题库练习
填空题Dr.Nolens self-confidence ______ him to become a competent surgeon. 诺兰医生的自信使他得以成为一名称职的外科医生。
进入题库练习
填空题It is ______ impossible to work with him. (absolute)
进入题库练习
填空题Fred: Was the novel as good as you expected?Nancy: ______
进入题库练习
填空题It was in 1492 that Columbus ______ America.哥伦布是在1492年发现美洲的。
进入题库练习
填空题Since the train had already gone , they had nothing to do but to wait in the hall.
进入题库练习
填空题Seismologist David Oppenheimer of" the U. S. Geological Survey Earthquakes Hazards Team explains (as told to Katherine Harmon) : Traditional geothermal drilling bores into hot rock such as sandstone that has water or steam trapped in its pore spaces and natural fractures. When a drilled hole intersects these fractures, the water flashes into steam because of the sudden drop in pressure-like bubbles that come out of a soda bottle when the cap is removed. The steam surges into the well hole, and the steam pressure at the surface spins a turbine to generate electricity. Sometimes the plant returns some of the water back into the reservoir to keep water levels up. The drilling itself does not cause earthquakes, but the steam removal and water return can do so, by producing new instability along fault or fracture lines. 1 ______________________ Researchers know they result from steam withdrawal or injection because when operators begin geothermal production in a new area, earthquakes begin and when production ends, the earthquakes stop. Many minor tremors occur, but quakes as large as magnitude 4.5 have been recorded. Residents of nearby Anderson Springs often feel tremors as small as magnitude 2.0 because the town sits only a couple of kilometers above the rock fractures. 2 ______________ When a large earthquake does occur, the public will ask whether the geothermal projects might have played a role in causing the rocks to shift along other faults. And researchers will have to use geodetic monitoring and other data to try to figure out whether it really was a factor in changing key stress dynamics. 3 ______________ Because the felsite has no natural pores, it also contains no water. To recover the heat, the project"s operators would have needed to fracture the rock and circulate water through it. First, in the short phase of the project, they would have drilled into the felsite and injected water to fracture the rock, most likely generating earthquakes in the process. Then, aided by borehole cameras revealing in which direction the fractures formed, they would have drilled a second hole to intersect the new fractures and would have produced steam by pumping water through the hot fractures linking the wells. This dry-rock geothermal approach has the potential to harness much more heat than the traditional sandstone techniques, but it can also mean more earthquakes. 4 ______________. Unfortunately, areas that are less tectonically active also have less accessible subterranean heat sources. 5 ______________. [A] California, for example, has more heat (because of its location near tectonic plate margins) than, say, Texas. The whole country has some geothermal potential if we wanted to draw warmth for heating. But the resulting heat would not necessarily have the energy to spin large turbines for electricity generation. [B] At a long-term geothermal project in northern California known as the Geysers, the USGS has been monitoring seismic activity since 1975. Even though the area does not appear to have any large faults running through it, researchers record about 4,000 quakes above magnitude 1.0 every year. [C] All sources of energy-hydropower, nuclear, wind or coal—have advantages and disadvantages. Geothermal energy has the advantage of being clean and renewable, but earthquakes are a downside. [D] In addition to the traditional geothermal plants at the Geysers, a pilot project, which was suspended last September, intended to draw steam directly from the volcanic, nonporous rock called Msite that lies below the sandstone and is its heat source. [E] To control the earthquake risk, drillers would have tried to keep the size of the fractures small and to maintain steady water flow rates. The threshold goal for earthquakes is 2.0 or lower on the Richter scale. Such deep-drilling operations would not want a repeat of events in Basel, Switzerland, where a widely felt magnitude 3.4 quake in 2006 ultimately stopped a similar geothermal project. [F] Many researches have been finished during the past years, and the relationship between the earthquake and Geothermal energy has been proved, which orientated the direction to the use of Geothermal energy. [E] Geologists suspect that even larger earthquakes could occur on nearby faults such as the Maacama, which is adjacent to the Geysers fields. The extraction of water and heat from the porous sandstone causes it to contract, much as a sponge shrinks when it dries out.
进入题库练习
填空题Evidence in support of lateralization for language in the left hemisphere of the brain comes from researches in d______listening tasks.
进入题库练习
填空题The government fretted that the ______ had illegally got the technology for making nuclear weapons. (terror)
进入题库练习
填空题On her way to the supermarket yesterday morning Mary met an old friend and stopped talking with him for quite a while . A. On her way B. met C. stopped talking D. while
进入题库练习
填空题The people injured in the accident (send) ______ to the nearest hospital for treatment last night.
进入题库练习
填空题Author______Title______ Yossarian let his eyes fall closed and hoped they would think he was unconscious. "He"s fainted," he heard a doctor say. "Can"t we treat him now before it"s too late? He really might die. " "All right, take him. I hope the bastard does die. "
进入题库练习
填空题The ______ of the scientific reasoning to the study of human behavior is one of the major principles of psychology. 把科学推理应用于人类行为研究是心理学的主要原理之一。
进入题库练习
填空题
进入题库练习
填空题You must solve the problem {{U}}当场{{/U}}
进入题库练习
填空题
进入题库练习
填空题testify to rehearsal demolish elusive evoke capital in search for disillusioned exotic legitimate strike implant novelty embark on in bulk nebulous pseudonym
进入题库练习