更多“证券组合分析的内容主要包括( )。”相关的问题
生态系统中的物质循环又称为地球化学循环，包括下面哪些基本类型（）。
A . 气体型循环
B . 海洋型循环
C . 沉积型循环
D . 大陆型循环
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有三款单核处理器分别执行同一个程序，各项技术指标如下。CPU1：时钟频率2.0GHz、CPI=1.5；CPU2：时钟频率1.5GHz、CPI=1.0；CPU3：时钟频率3.0GHz、CPI=2.5。这三款处理器，哪款的执行速度相对更快一些？（）
A.CPU1
B.CPU2
C.CPU3
D.题目中的条件不足，无法判断
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与情绪相比，情感具有稳定性、激动性和持久性特点。
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哮喘发作不会出现( )
A．FEV1/FVC下降B．PEER降低C．RVF、RC增加D．RV/TLC增加E．DLCO增加
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校验导体动、热稳定，选取被校验导体或电器通过最大短路电流短路点，下列哪项不符合规范要求？（）
\tA.对带电抗器的10kV出线，校验母线与母线隔离开关之间隔板前的引线和套管时，应选在电抗器前
\tB.对带电抗器的10kV出线，校验管形母线的动稳定，应选在电抗器之后
\tC.对不带电抗器的回路，短路点应选在各种接线方式时短路电流为最大的地点
\tD.对带电抗器的10kV厂用分支回路，校验母线与母线隔离开关之间隔板前的引线和套管时，应选在电抗器前
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学前教育研究过程的第一个环节为（）
A.查阅文献
B.选择研究问题
C.研究设计
D.收集资料
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喷菌现象为细菌病害所特有，是区分细菌病害或真菌、病毒病害的最简便的手段之一。
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在vi命令模式下，使用（）命令删除当前光标所在单词字符至下一个单词开始的几个字符。
A.x
B.dw
C.d$
D.dd
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人民法院委托拍卖，如果出现流拍，再行拍卖时，可以酌情降低保留价，但每次降低的数额不得超过前次保留价的（）。
A.5%
B.10%
C.15%
D.20%
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How far away you are from retirement plays a large part in how you should invest your retirement money. According to Leslie Wright of Westminster Portfolio Services Ltd., there are three stages to a long-term regular savings plan for retirement: capitalization, consolidation and conservation. In the first stage, people should be most concerned with building up their retirement savings investment. According to Wright, these investors can "take as aggressive an outlook as their nerves can stand," because at this point there is little capital to risk. The second step, consolidation, makes up the bulk of your savings plan; balance the aggressive investments with some tamer ones, to better protect your existing possessions. The final change, from consolidation to conservation, when your investments should aim to preserve the capital you have, should take place one to three years before you retire. The exact timing of all these should take current market conditions into account, although Wright warns against risky betting on future growth. "Greed must not be allowed to blind prudence," he says.Whatever vehicles you choose for your retirement share-holding, be sure to take advantage of dollar-cost averaging. By investing a fixed amount at regular intervals, you"ll be able to avoid the risk of poorly timed investments by averaging out the peaks and valleys of the market. Plus, regular contributions will let you avoid the temptation to drop out when the market falls, and to buy too much when prices are high.Those who are well along the road to retirement may have cause for concern these days. The plunging stock and property markets have shrunk savings, for retirement and otherwise; and some people have not planned for their retirement at all.You won"t be that rash, of course, but what if you"re already in mid-career and don"t have a retirement plan in place If you don"t make some serious cuts in your spending and save heavily now, you"ll have to sacrificein your golden years.Of course, it"s better still to get off on the right foot by starting your planning early. "No one should have to compromise his living standards when he retires," says Wright. "Retirement is a time to really enjoy life. We have all worked so hard. " And one of the things you should be working hard on right now is planning for those days of enjoyment.
A．Savings StrategyB．Enjoy Your Later YearsC．Plan for RetirementD．Risky Stock Market
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被困室内时，可在窗口、阳台或屋顶发出求救信号，正确做法是()
A、夜间摇晃手电筒、挥动白色布条
B、敲击金属物品或投掷软物品
C、白天可挥动鲜艳布条
D、向外大声呼叫
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下列各项中，属于增值税免税项目的有（）
A.残疾人提供修理自行车劳务 B.小规模纳税人销售旧货 C.个人转让著作权 D.养老机构提供的养老服务
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分析如下的问题：有关系模式R（U，F），属性集U={A，B，C，D，E}，函数依赖集合F={AB->C，C->D，D->E}，请回答如下的问题： （1）R最高属于第几范式？说明理由； （2）R属于第三范式？说明理由，若是第三范式就不用分解，否则分解成符合第三范式的模式。
分析如下的问题：有关系模式R（U，F），属性集U={A，B，C，D，E}，函数依赖集合F={AB->C，C->D，D->E}，请回答如下的问题：
（1）R最高属于第几范式？说明理由；
（2）R属于第三范式？说明理由，若是第三范式就不用分解，否则分解成符合第三范式的模式。
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《安全色》GB2893－2008规定，黄色与黑色相间条纹表示()｡
A.必须遵守规定
B.危险位置的安全标记
C.禁止人们进入危险的环境
D.提示标志牌同时使用,更为醒目的提示人们
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以下哪种不属于工商银行信用卡预约销户业务中必须提供的证件（）
A.持卡人身份证
B.代办人身份证
C.代办人与持卡人关系证明
D.待处理卡片实物
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