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【单选题】
下列关于风险分散风险和风险对冲的说法，正确的是（ ）A.
只要两种资产收益率的相关系数不为零，那么投资于这两种资产就能降低风险
B.
如果两种资产收益率的相关系数为-0．7，那么投资于这两种资产能较好地对冲风险
C.
如果两种资产收益率的相关系数为1，那么投资于这两种资产能较好地对冲风险
D.
如果两种资产收益率的相关系数为-1，那么分散投资于这两种资产就能完全消除风险
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【多选题】The scientific methods for research include:
A.
Identify the importance and possible impact of your research, identify what has been so far demonstrated by other colleagues
B.
Define a research question that is meaningful and researchable, develop a hypothesis and provide a rationale for it
C.
Define specific aims which are measurable and focused, choose an appropriate research design, analyze the data, draw conclusions
D.
Communicate the findings, evaluation of communication impact, transformation through changing policy and practice
【简答题】按安全管理的职能分类，安全目标管理包含()。 A安全目标决策 B安全生产目标管理 C高层安全目标管理 D安全目标组织
【单选题】Concrete Another thing to remember in connection with concrete is that you are not allowed very much leeway for errors in either measurements or location. Once you have a solid mass of concrete set in...
A.
Concrete and Its Uses
B.
Rules for Working with Concrete
C.
Concrete, the Homeowner's Joy
D.
Concrete, a Test of Character
【简答题】人教版九年级下册英语全品学练考Unit13单元语法聚焦十三答案
【单选题】有一三相对称负载接于线电压UL =380V的三相电源上,其每相的电阻R=16 Ω,感抗XL =12Ω,则负载星形联结时的相电流为()
A.
11A
B.
19A
C.
33A
【多选题】Which of the following makes your paper irrelevant? (多选)
A.
It is not obvious what the problem is.
B.
The author has given a clear motivation for the work, but the bulk of the paper concerns something else entirely.
C.
Papers are submitted to an inappropriate venue.
D.
There is no statement of aims or goals, and no claimed contribution.
【单选题】________ hard one may work, one cannot master a foreign language in a month or two.
A.
Whenever
B.
Wherever
C.
Whatever
D.
However
【单选题】You can walk one mile or two to the crossroads where the school bus will ______ you ______.
A.
bring; up
B.
call; up
C.
pick; up
D.
keep; up
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