张岚作为理财规划师，打算为客户构建一个有股票和债券的投资组合，这两种资产的预期收益率分别是每年10%和5%，预期收益的标准分别是每年20%和15%，股票/债券收益之间的相关系数为：-0.5。
根据案例回答下列问题。
| Although the American civilization took
over and replaced the frontier over a century ago, the heritage of the frontier
is still evident in the United States today. Many people are still fascinated by
the frontier because it has been particularly important in shaping American
values. For many years, the frontier experience was romanticized in popular
movies and television shows that featured cowboy heroes fighting Indian
villains. Little attention was given to the tragic story of what really happened
to Native Americans. Today, most Americans are more aware of the darker side of
the settling of the continent, when thousands of Native American Indians were
killed, their lands were taken, and much of their culture was
destroyed. The American frontier consists of the relatively unsettled regions of the United States, usually found A. the frontier area is more civilized and developed than other parts of the country B. the frontier experience is greatly romanticized in today’s popular movies and TV shows C. the frontier period represents a time when the traditional basic Americans values were expressed in their purest form D. the lifestyle of the Native American Indians who live in the frontier area is still mysterious and appealing [单选题]对采用单相重合闸的线路，当发生永久性单相接地故障时，保护及重合闸的动作顺序为（）。
A.A、三相跳闸不重合 B.B、选跳故障相、延时重合单相、后加速跳三相 C.C、选跳故障相、瞬时重合单相、后加速跳三相 D.D、选跳故障相、延时跳三相 [单项选择]（）是项目投资决策的基础。
A. 市场预测 B. 市场调查 C. 市场分析 D. 市场决策 [单选题]下列关于资金归集描述错误的是______。
A.资金归集关系按照由上到下的规则建立 B.资金归集关系按照由上到下的规则删除 C.资金归集关系按照由下到上的规则删除 D.银行结算账户开户行有权进行资金归集关系建立子交易操作 [单项选择]下列各项展开式中不等于每股收益的是（）。
A. 总资产收益率×平均每股净资产 B. 股东权益收益率×平均每股净资产 C. 总资产收益率×权益乘数×平均每股净资产 D. 主营业务收入净利率×总资产周转率×权益乘数×平均每股净资产 [多选题] 根据《安全生产法》规定,生产经营单位对重大危险源应当登记建档,进行定期( ),并制定应急预案,告知从业人员和相关人员在紧急情况下应当采取的应急措施。
A.检测 B.评估 C.监控 D.论证 我来回答: 提交
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