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【简答题】
设（X，Y）为二维随机向量，D（X）、D（Y）均不为零。若有常数a>0与b使 ，则X与Y的相关系数P XY =（）
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反馈参考答案：
举一反三
【单选题】An agency relationship exists when one party delegates
A.
decision-making responsibility to a second party
B.
financial responsibility to employees
C.
strategy implementation actions to functional managers
D.
ownership of a company to a second party
【简答题】我国重要的粮食、糖料作物和蚕丝基地是（ ）。
【单选题】When an acquisition or merger is not desired by one party, it is called:
A.
takeover
B.
forward integration
C.
backword integration
D.
joint venture
【简答题】我国重要的豆类作物栽培种有：()等。
【单选题】I have some difficulties __these words．Would you mind __ me your dictionary?
A.
understanding, lending
B.
to understand, to lend
C.
to understand, lending
D.
understanding, to lend
【简答题】简述 (磁盘的)数据传输率
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