更多“ZXMPS320设备的电源板有（）。”相关的问题
下列软件中不属于应用软件的是( )。 A．操作系统 B．科学计算程序 C．办公自动化软件 D．辅助设计软件
A.操作系统B.科学计算程序C.办公自动化软件
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对大偏心受压构件,当 N 或 M 变化时,对构件安全产生的影响是( )。
A. M 不变时， N 越大越危险B. M 不变时， N 越小越危险C. N 不变时， M 越大越危险D. N 不变时， M 越小越危险
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生产者剩余是指：
A．生产者的生产能力与实际产量之间的差额
B．雇员对企业所做的贡献与他们所得工资之间的差额
C．生产者的销售能力和实际产量之间的差额
D．生产者的销售收入与成本之间的差额
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牵引杆机构的特点是转向架有固定的回转中心。（）
A . 正确
B . 错误
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A history of long and effortless success can be a dreadful handicap, but, if properly handled, it may become a driving force. When the United States entered just such a glowing period after the end of the Second World War, it had a market eight times larger than any competitor, giving its industries unparalleled economies of scale. Its scientists were the world’’s best, its workers were the most skilled. America and Americans were prosperous beyond the dreams of the Europeans and Asians whose economies the war had destroyed. It was inevitable that this primacy should have narrowed as other countries grew richer. Just as inevitably, the retreat from predominance proved painful. By the mid-1980s Americans had found themselves at a loss over their fading industrial competitiveness. Some huge American industries, such as consumer electronics ,had shrunk or vanished in the face of foreign competition. By 1987 there was only one American television maker left, Zenith. (Now there is none: Zenith was bought by South Korea’’s LG Electronics in July.)Foreign-made cars and textiles were sweeping into the domestic market. America’’s machine-tool industry was on the ropes. For a while it looked as though the making of semiconductors, which America had invented and which sat at the heart of the new computer age, was going to be the next casualty. All of this caused a crisis of confidence. Americans stopped taking prosperity for granted. They began to believe that their way of doing business was failing, and that their incomes would therefore shortly begin to fall as well. The mid-1980s brought one inquiry after another into the causes of America’’s industrial decline. Their sometimes sensational findings were filled with warnings about the growing competition from overseas. How things have changed! In 1995 the United States can look back on five years of solid growth while Japan has been struggling. Few Americans attribute this solely to such obvious causes as a devalued dollar or the turning of the business cycle. Self-doubt has yielded to blind pride. "American industry has changed its structure, has gone on a diet, has learnt to be more quick-witted, "according to Richard Cavanagh, executive dean of Harvard’’s Kennedy School of Government. "It makes me proud to be an American just to see how our businesses are improving their productivity," says Stephen Moore of the Cato Institute, a think-tank in Washington D. C. And William Sahlman of the Harvard Business School believes that people will look back on this period as "a golden age of business management in the United States."
A．It is human nature to shift between self-doubt and blind pride.B．Intense competition may contribute to economic progress.C．The revival of the economy depends on international cooperation.D．A long history of success may pave the way for further development.
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县级以上人民政府应当组织（）等执法部门对相关旅游经营行为实施监督检查。
A . 旅游主管部门
B . 交通主管部门
C . 工商行政管理部门
D . 产品质量监督部门
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联机检索与网络检索的不同之处包括( )
A、标引所依据的语言
B、提供检索的逻辑组配手段
C、检索入口
D、系统界面设计
此题为多项选择题。
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清政府决定在台湾正式建立行省主要是因为（）。
A.台湾成为西方列强争夺的对象
B.加强台湾与内地的联系
C.台湾在国防上的重要地位
D.巩固国家统一
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硝酸对钢材有较强的腐蚀性，所以它不可用于不锈钢的清洗。
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铝（Al）被高速电子束轰击而产生的连续X光谱的短波限为5。问这时是否也能观察到其标志谱K系线？
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空气中甲烷气体标准物质是指采用国家计量行政部门批准、颁布并具有相应的标准物质“制造计量器具许可证”的单位提供的空气中甲烷气体标准物质。
A . 正确
B . 错误
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双杆作业，舱口吊杆的仰角应不大于：（）
A.60度
B.70度
C.75度
D.80度
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影响混凝土拌和物和易性的主要因素包括单位体积用水量、砂率、组成材料的性质、时间和温度等，其中（）是影响混凝土和易性的最主要因素。
A．单位体积用水量
B．砂率
C．组成材料的性质
D．时间和温度
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Most people are right-handed and children usually have the same handedness as their parents. This suggests that genes are at work. But identical twins have identical genes, so genes cannot be the whole story. Cultural attitudes seem to have played an important part in the development of hand preferences. In the past, left-handed have suffered anything from teasing to flogging. Even today in some countries en forced right-handedness, particularly for writing and eating, is still common. To explain the observed patterns of handedness, researchers have devised what is known as a' geneculture coevolution' model. The initial assumption of the model-drawn from observation of non-human primates and other mammals such as mice-is that early on in human evolution, the genetic make-up of individuals inclined them to prefer one hand or the other, but that the population was equally divided between right and left-handed people. Over time, according to the model, the interaction of genes and culture has produced a state where everyone has identical genes for handedness. This would happen if, for whatever reason, right-handers were more likely to survive and reproduce. The idea may not be that far fetched. Many biologists believe that handedness is related to brain structure, say, for example, early right-handers may have been better at language. The model predicts that today everyone has genes which confer a basic predisposition of 78% to be right-handed. How children actually turn out, however, can be influenced by whether their parents are dextral or sinistral. For example, children may mimic their parents. Or parents may influence the handedness of their children in the way that they hand them toys or food. The researchers reckon that a child with two right-handed parents has a 91% probability of being right-handed; a child with two left-handed parents has a probability of only 63% of being right-handed. But parental influence does not account for everything. Random events during a child's development can also have a small effect on handedness. Even if identical twins have parents who are both dextral, factors such as their position in the womb may result in the twins not preferring the same hands. The model seems plausible. It accurately predicts the results of 13 studies of the handedness of twins as well as the proportion of left-handers found in the population at large (roughly 12%, a figure that seems to be quite stable). Asymmetries in early tools, and in the way in which prey were clubbed, suggest that hominids as early as the Australopithecines may have preferred their right hands. Whatever the origin of this dexterous preference, though, left-handers remain at large. Some people are just sinister.The author points out at the beginning that ______.A．handedness is solely determined by genesB．handedness is solely determined by cultureC．handedness is determined by both genes and cultureD．handedness may be determined by factors other than genes and culture
A.B.C.D.E.TheF.A．handednessG.handednessH.handednessI.handedness
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淋巴细胞交叉配合试验的目的主要是检测（）
A.受者血清中有无抗供者淋巴细胞的抗体
B.供者血清中有无抗受者淋巴细胞的抗体
C.受者淋巴细胞HLA-DR抗原
D.供者淋巴细胞HLA-DR抗原
E.供者淋巴细胞HLA-DP抗原
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