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问题 多项选择题

电网企业、电网使用者应当按照检修计划安排检修工作，加强设备运行维护，减少（）和（）。

A.非计划停运

B.临时检修

C.重复停电

D.事故

答案

参考答案：A, D

选择题

下列动物行为不属于动物“通讯”的是[ ]

A．蚂蚁根据同伴的分泌物找到食物  

B．长尾猴发现豹时会发出一种叫声  

C．小动物闻到老虎气味纷纷逃跑  

D．乌鸦见到老鹰时大声鸣叫
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单项选择题

An analyst does research about asset classes. When an investor defines an asset class for the purpose of asset allocation, which of the following statements is most accurate The investor should ensure that assets in one class:（）

A. have high paired correlations with other asset classes and relatively homogeneous.

B. have low paired correlations with other asset classesand relatively heterogeneous.

C. have low paired correlations with other asset classesand relatively homogeneous.
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