更多“通过改变每个天线上信号的什么参数可以实现不同的方位上进行叠加”相关的问题
从轨道根数历元到观察时刻只有做到了什么才能得到真位置（）？
A、订正岁差
B、订正大气折射
C、订正光行差
D、订正章动
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下面（）程序不属于审计准备阶段的主要工作。
A.明确审计任务，确定审计项目 B.委派审计人员，确定审计方式 C.确定审计重点，臸定审计方案 D.初步分析，综合评价
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“颦儿”指的是（）
A.薛宝钗 B.林黛玉 C.史湘云 D.妙玉
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原料乙烯设计要求纯度最小是（）%，CO含量最大是（）ppm，CO2含量最大是（）ppm。
A.99.9，1，5
B.99.9，3，5
C.99.5，1，5
D.99.9，5，10
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睫毛线的眼部化妆的重要内容，具有()作用
A.调整眼睛轮廓
B.使眼影加强
C.改善黑眼圈
D.调整两眼的间距
E.增加眼睛的神采
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底片普遍灰雾严重，可能是因为（）。
A.胶片过期 B.暗室安全灯太亮 C.显影时间过长，温度过高 D.以上都是
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有关抽样风险与非抽样风险的下列表述中,注册会计师不能认同的是( )。
A. 信赖不足风险与误拒风险会降低审计效率B. 信赖过度风险与误受风险会影响审计效果C. 非抽样风险对审计工作的效率和效果都有影响D. 审计抽样只与审计风险模型中的检查风险相关
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癃闭舒胶囊除清热通淋外，又能（ ）。
A. B. C. D. E.
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PS软件中，曲线命令的快捷键是（）
A.Ctrl+L
B.Ctrl+M
C.Ctrl+U
D.Ctrl+B
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The long years of food shortage in this country have suddenly given way to apparent abundance. Stores and shops are choked with food. Rationing is virtually suspended, and overseas suppliers have been asked to hold back deliveries. Yet instead of joy, there is widespread uneasiness and confusion. Why do food prices keep on rising, when there seems to be so much more food about7 Is the abundance only temporary, or has it come to stay7 Does it mean that we need to think less now about producing more food at home No one knows what to expect. The recent growth of export surpluses on the world food market has certainly been unexpectedly great, partly because a strange sequence of two successful grain harvests in North America is now being followed by a third. Most of Britain’s overseas suppliers of meat, too, are offering more this year and home production has also risen. But the effect of all this on the food situation in this country has been made worse by a simultaneous rise in food prices, due chiefly to the gradual cutting down of government support for food. The shops are overstocked with food net only because there is more food available, but also because people, frightened by high prices, are buying less of it. Moreover, the rise in domestic prices has come at a time when world prices have begun to fall, with the result that imported food, with the exception of grain, is often cheaper than the home-produced variety. And now grain prices, too, are falling. Consumers are beginning to ask why they should not be enabled to benefit from this trend. The significance of these developments is not lost on farmers. The older generations have seen it all happen before. Despite the present price and market guarantees, farmers fear they are about to be squeezed between cheap food imports and a shrinking home market. Present production is running at 51 per cent above pre-war levels, and the government has called for an expansion to 60 per cent by 1956; but repeated Ministerial advice is carrying little weight and the expansion program is not working very well.
A．Despite the abundance, food prices keep rising.B．The abundant food supply is not expected to last.C．Britain will cut back on its production of food.D．Britain is importing less food.
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场景由一个命名视图和一个或多个光源组成，如果指定了场景，RENDER将使用场景中的视图和光源信息，AutoCAD的图形文件中可建立（）场景。
A.无数个
B.不超过20个
C.5个
D.3个
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根的生理功能有（）
A.吸收作用
B.固着作用
C.贮藏作用
D.光合作用
E.繁殖作用
F.传粉作用
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用于制造盛装毒性为极度或高度危害介质的压力容器，当符合成形后进行相应热处理以恢复材料性能的要求时，冷成形件变形率控制指标，碳钢、低合钢变形率控制指标（）奥氏体不锈钢变形率控制指标。
A.小于B.大于C.等于
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