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【简答题】
Suppose the same client as in the previous problem prefers to invest in your portfolio a proportion (y) that maximizes the expected return on the overall portfolio subject to the constraint that the overall portfolio’s standard deviation will not exceed 20%. What is the investment proportion, y?
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【简答题】Why do you think T asks Ss to practice the dialogue in exchanged roles?
【单选题】病人,男,45岁。有酗酒史20年。体检查体:肝肋下3cm,脾脏肋下4cm。面颈部可见蜘蛛痣。病人出现蜘蛛痣可能的原因是( )
A.
雄激素过多
B.
垂体功能减退
C.
雌激素过多
D.
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E.
继发性醛固酮增多
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【单选题】A developer wants too use EL to invoke a function using S{my：bloof（“foof”）}. Which is always true？（）
A.
The method invoked by this function must be statie.
B.
The function class must implement the Function interface.
C.
The expression is NOT a valid EL expression for invoking a function.
D.
The function must be declared in a web.xml file using the element.
E.
The function class must have a method with the signature：Void bloof （java.lang.Strings）
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