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【简答题】
若 随机变 量 X, Y 相互独立,且都服从二点分布 B (1, 0.4) ,则 X+Y ~
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举一反三
【简答题】人们开始着手研究使不同厂商生产的异构机型能够相互通信的技术，国际标准化组织ISO也因此制定的一个通信协议的国际标准（），对通信系统进行了标准化。
【简答题】位置力反馈两级电液伺服阀名称的含义,它属于哪种反馈形式的电液伺服阀?
【单选题】What can we learn about the research on tree genes?
A.
The research methods are the same as the analysis of human genes.
B.
The findings are expected to be as fruitful as the analysis of human genes.
C.
It will take as much time and effort as the analysis of human genes.
D.
The research has been mainly concentrated on the genes of young trees.
【单选题】Which of the following can be learned from Paragraph 2 about the research on tree genes?
A.
The research methods are the same as the analysis of human genes.
B.
The findings are expected to be as fruitful as the analysis of human genes.
C.
It will take as much time and effort as the analysis of human genes.
D.
The research has been mainly concentrated on the genes of young trees.
【简答题】太阳病，头痛发热，身疼，腰痛，骨节疼痛，恶风，（），麻黄汤主之。
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