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【判断题】
现在大部分的操作系统为Windows操作系统,该系统存在着很多安全隐患。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】考虑两种 完全负相关 的风险证券A和B,其中A的期望收益率为10%,标准差0.16;B的期望收益率8%,标准差为0.12。则A和B在最小标准差资产组合中的权重分别是( )。
A.
．0.24，0.76
B.
0.50，0.50
C.
．0.43，0.57
D.
0.57，0.43
【单选题】It was not until I received the text message that I knew___a serious disease he had been suffering from,and began to worry about___he could pull through this Christmas. [ ]
A.
what; whether
B.
how ; if
C.
that; that D .which ; how
【简答题】应答器是一种能向车载子系统发送报文信息的传输设备，既可以（），也可连接轨旁单元传送可变信息。
【简答题】偏柱犁因其工作部件的（），其作业时在受力与布置方面均有一定的影响。
【单选题】I knew that he _____ for Beijing two hours before.
A.
left
B.
leaves
C.
is leaving
D.
had left
【单选题】考虑两种完全负相关的风险证券A和B。A的期望收益率为10%，标准差为16%。B的期望收益率为8%，标准差为12%。 用这两种证券组合成的无风险投资组合的收益率将为_____。
A.
8.5%
B.
9.0%
C.
8.9%
D.
9 .9%
【单选题】I knew it was his carelessness that had caused the accident, but he didn’t want to admit ______ it in public.
A.
in
B.
by
C.
on
D.
to
【简答题】请找出下面对话当中出现的宾语从句。 A: Where did you go yesterday? B: I went to see Wang Ming. A: What did you say to him? B: I said that I needed his help. A: What did he say? B: He said that he was glad to help me. A...
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