Release Request
从()release版本开始SBEVM电路板支持2载三扇。
A:release 33 B:release 32 C:release 31 D:release 30
Underground Coal Fires -- a Looming Catastrophe
Coal burning deep underground in China, India and Indonesia is threatening the environment and human life, scientists have warned. These large-scale underground blazes cause the ground temperature to heat up and kill surrounding vegetation, produce greenhouse gases and can even ignite forest fires, a panel of scientists told the annual meeting of the American Association for the Advancement of Science in Denver. The resulting release of poisonous elements like arsenic and mercury can also pollute local water sources and soils, they warned.
"Coal fires are a global catastrophe," said Associate Professor Glenn Stracher of East Georgia College in Swainsboro, USA. But surprisingly few people know about them.
Coal can heat up on its own, and eventually catch fire and burn, if there is a continuous oxygen supply. The heat produced is not caused to disappear and under the right combinations of sunlight and oxygen, can trigger spontaneous catching fire and burning. This can occur underground, in coal stockpiles, abandoned mines or even as coal is transported. Such fires in China consume up to 200 million tones of coal per year, delegates were told. In comparison, the U.S. economy consumes about one billion tones of coal annually, said Stracher, whose analysis of the likely impact of coal fires has been accepted for publication in the International Journal of Coal Ecology. Once underway, coal fires can bum for decades, even centuries. In the process, they release large volumes of greenhouse gases, poisonous fumes and black particles into the atmosphere.
The members of the panel discussed the impact these fires may be having on global and regional climate change, and agreed that the underground nature of the fires makes them difficult to detect. One of the members of the panel, Assistant Professor Paul Van Dijk of the International Institute for Geo-Information Science and Earth Observation in the Netherlands, has been working with the Chinese government to detect and monitor fires in the northern regions of the country.
Ultimately, the remote sensing and other techniques should allow scientists to estimate how much carbon dioxide these fires are emitting. One suggested method of containing the fires was presented by Gary Colaizzi, of the engineering firm Goodson, which has developed a heat-resistant grout (a thin mortar used to fill cracks and crevices), which is designed to be pumped into the coal fire to cut off the oxygen supply.
A:Using remote sensing technique. B:Controlling the release of carbon dioxide. C:Making the soil heat resistant. D:Cutting off the oxygen supply.
Underground Coal Fires Coal burning deep underground in China, India and Indonesia is threatening the environment and human life, scientists have warned. These large scale ______ (51) blazes (火焰) cause the ground temperature to heat up and kill surrounding vegetation, produce greenhouse gases and can ______ (52) ignite (点燃) forest fires, a group of scientists told the annual meeting of the American Association for the Advancement of Science in Denver . The resulting ______ (53) of poisonous elements like mercury can also pollute local water sources and soils, they warned. “Coal fires are a global disaster,” said Associate Professor Glenn Stracher of East Georgia Collage in Swainsboro, USA. But ______ (54) few people know about them. Coal can heat up on its own, and eventually catch fire and burn, if there is a continuous oxygen supply. The heat produced is not caused to ______ (55) and under the right combinations of sunlight and oxygen, can trigger spontaneous (自发的) catching fire and burning . This can occur underground, in coal stockpiles, abandoned mines or even as coal is transported. ______ (56) fires in China consume up to 200 million tons of coal per year, delegates were told. In ______ (57), the U.S economy consumes about one billion tons of coal annually, said Stracher, ______ (58) analysis of the likely impact of coal fires has been accepted for publication in the International Joomal of Acoal Ecology. ______ (59) underway, coal fires can burn for decades, even centuries. In the process, they release large ______ (60) of greenhouse gases, poisonous fumes and black particles into the atmosphere. The members of the panel discussed the ______ (61) these fires may be having on global and regional climate change, and agreed that the underground nature of the fires makes them difficult to ______ (62). Ultimately, the remote sensing and other techniques should allow scientists to ______ (63) how much carbon dioxide these fires are emitting (释放) 。 One suggested ______ (64) of containing the fires was presented by Gary Colaizzi, of the engineering firm Goodson, which has developed a heat-resistant grout (灌浆),which is designed to be pumped into the coal fire to ______ (65) the oxygen supply.
A:release B:paste C:consumption D:elimination
A:Group training can increase the release of endorphin. B:Individual training can increase the release of endorphin. C:Religious rituals do not belong to communal activity, D:Rowing is a sport which requires less team work.
A Hierarchy of Hormones All of the cells in a particular plant start out with the same complement of genes. How then can these cells differentiate and from structures as different as roots, stems, leaves, and fruits? The answer is that only a small subset of the genes in a particular kind of cell are expressed, or turned on, at a given time. This is accomplished by a complex system of chemical messengers that in plants include hormones and other regulatory molecules. Five major hormones have been identified; auxin (生长素), abscisic acid(脱落酸) ,cytokinin(细胞激动素), hetylene(乙烯), and gibberellin(赤霉素). Studies of plants have now identified a new class of regulatory molecules called oligosaccharins. Unlike the oligosaccharins, the five well-known plant hormones are pleiotropic (多向性的) rather than specific, that is, each has more than one effect on the growth and development of plants. The five have so many simultaneous effects that they are not very useful in artificially controlling the growth of crops. Auxin, for instance, stimulates the rate of cell elongation(拉长), causes shoots to grow up and roots to grow down, and inhibits the growth of lateral(侧面的) shoots. Auxin also causes the plant to develop a vascular(维管的) system, to from lateral roots, and to produce ethylene. The pleiotropy of the five well-studied plant hormones is somewhat analogous (类似的) to that of certain hormones in animal. For example, hormones from the hypothalamus (下五脑) in the brain stimulate the anterior(前面的) lobe of the pituitary gland to synthesize and release many different hormones, one of which stimulates the release of hormones from the adrenal(肾上腺的) cortex(皮质|). These hormones have specific effects on target organs all over the body. One hormone stimulates the thyroid (甲状腺的) gland, for example, another the ovarian (子房)follicle cells, and so forth. In other words, there is a hierarchy(统治集团) of hormones. Such a hierarchy may also exist in plants. Oligosaccharins are fragments of the cell wall released by enzymes (酶): different enzymes release different oligosaccharins. There are indications that pleiotropic plant hormones may actually function by activating the enzymes that release these other, more specific chemical messengers from the cell wall. The passage suggests that which of the following is a function likely to be performed by an oligosacharin?
A:To stimulate a particular plant cell to become part of a plant’s root system. B:To activate enzymes that release specific chemical messengers from plant call walls. C:To duplicate the gene complement in a particular plant cell. D:To produce multiple effects on a particular subsystem of plant cells.
RELEASE ALL命令的功能是( )。
A:删除指定的内存变量 B:删除所有内存变量 C:删除指定的全局变量 D:删除内存变量文件中的内存变量
RELEASE sample1命令的功能是 ______。
A:清除整个屏幕 B:释放sample1内存变量 C:清除所有内存变量 D:清除所有变量
RELEASE ALL命令的功能是______。
A:删除指定的内存变量 B:删除所有内存变量 C:删除所有文件 D:删除内存变量文件中的内存变量