皮皮学，免费搜题
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【单选题】
肠内营养最常见的消化道并发症是( )
A.
腹胀腹泻
B.
便秘
C.
黑便
D.
菌群失调
拍照语音搜题，微信中搜索"皮皮学"使用
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【多选题】A、B两种证券的相关系数为0.4,期望报酬率分别为12%和16%,标准差分别为20%和30%,在投资组合中A、B两种证券的投资比例分别为60%和40%,则A和B两种证券构成的投资组合的期望报酬率和标准差分别为( )。
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0.136
B.
0.24
C.
0.2008
D.
0.146
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【单选题】人体有几种基本组织
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3
B.
4
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5
D.
6
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【单选题】人体的基本组织有几种?
A.
1
B.
2
C.
3
D.
4
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【简答题】Lily: Hello! 11 Is Sue there? Billy: I’m sorry, Lily. Sue isn’t in right now. Lily: 12 Billy: I’m not quite sure. Probably sometime tonight. 13 Lily: Yes, that would be great. Please ask her if I can ...
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【单选题】配制360ml 1/6mol/L的乳酸钠溶液，需要112g/L的乳酸钠(20ml/支)(    )
A.
3支    
B.
2支    
C.
1支    
D.
6支
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【单选题】--Is this Lily? --______
A.
No, she is
B.
Yes, this is
C.
Yes, she is
D.
No, it isn’t
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【单选题】____this lily? Yes,_____ is.
A.
Is;it
B.
Is; this
C.
Is; she
D.
Is; he
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【简答题】Lily: Hello! ________ Is Sue there? Billy: I’m sorry, Lily. Sue isn’t in right now. Lily: ________ Billy: I’m not quite sure. Probably sometime tonight. ________ Lily: Yes, that would be great. Please...
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【多选题】Lily: Hello! 11 Is Sue there? Billy: I’m sorry, Lily. Sue isn’t in right now. Lily: 12 Billy: I’m not quite sure. Probably sometime tonight. 13 Lily: Yes, that would be great. Please ask her if I can ...
A.
Yes, that would be great.
B.
You’re welcome.
C.
This is Lily speaking.
D.
Would you like me to give her a message?
E.
Do you know when she will be back?
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【简答题】股票A和股票B的部分年度资料如下： 市场行情 概率 A股票收益率（%） B股票收益率（%） 好 0.3 25 30 一般 0.4 22 26 差 0.3 19 22 要求： （1）分别计算投资于股票A和股票B的预期收益率和标准差。 （2）如果投资组合中，股票A占40%，股票B占60%，若股票A和股票B收益率的相关系数为0．35，该组合的期望收益率和组合标准差是多少? （3）如果投资组合中，股票A占...
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相关题目：
【多选题】A、B两种证券的相关系数为0.4,期望报酬率分别为12%和16%,标准差分别为20%和30%,在投资组合中A、B两种证券的投资比例分别为60%和40%,则A和B两种证券构成的投资组合的期望报酬率和标准差分别为( )。
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0.136
B.
0.24
C.
0.2008
D.
0.146
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【单选题】人体有几种基本组织
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3
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4
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5
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6
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【单选题】人体的基本组织有几种?
A.
1
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2
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3
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4
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【简答题】Lily: Hello! 11 Is Sue there? Billy: I’m sorry, Lily. Sue isn’t in right now. Lily: 12 Billy: I’m not quite sure. Probably sometime tonight. 13 Lily: Yes, that would be great. Please ask her if I can ...
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【单选题】配制360ml 1/6mol/L的乳酸钠溶液，需要112g/L的乳酸钠(20ml/支)(    )
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B.
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【单选题】--Is this Lily? --______
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B.
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C.
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D.
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【单选题】____this lily? Yes,_____ is.
A.
Is;it
B.
Is; this
C.
Is; she
D.
Is; he
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【简答题】Lily: Hello! ________ Is Sue there? Billy: I’m sorry, Lily. Sue isn’t in right now. Lily: ________ Billy: I’m not quite sure. Probably sometime tonight. ________ Lily: Yes, that would be great. Please...
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【多选题】Lily: Hello! 11 Is Sue there? Billy: I’m sorry, Lily. Sue isn’t in right now. Lily: 12 Billy: I’m not quite sure. Probably sometime tonight. 13 Lily: Yes, that would be great. Please ask her if I can ...
A.
Yes, that would be great.
B.
You’re welcome.
C.
This is Lily speaking.
D.
Would you like me to give her a message?
E.
Do you know when she will be back?
查看完整题目与答案
【简答题】股票A和股票B的部分年度资料如下： 市场行情 概率 A股票收益率（%） B股票收益率（%） 好 0.3 25 30 一般 0.4 22 26 差 0.3 19 22 要求： （1）分别计算投资于股票A和股票B的预期收益率和标准差。 （2）如果投资组合中，股票A占40%，股票B占60%，若股票A和股票B收益率的相关系数为0．35，该组合的期望收益率和组合标准差是多少? （3）如果投资组合中，股票A占...
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