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【简答题】
设随机变量X服从参数为λ的泊松分布，且已知E[(X-1)(X-2)]=1，则λ=______
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反馈参考答案：
举一反三
【判断题】The prefixes “pre-” and “post-” are synonymous, i.e. they have the same meaning.
A.
正确
B.
错误
【简答题】Read the information. Word Formation Usual Meaning Example post- noun/ adjective prefix after postmodernism pre- noun/ adjective prefix before pre-war anti- noun/ adjective prefix against anti-establi...
【单选题】The prefixes “pre-” and “post-” in the words “prewar” and “postgraduate” are prefixes of ______.
A.
orientation and attitude
B.
time and order
C.
degree or size
D.
number
【简答题】Please consult your dictionary for the meaning of the prefixes in teh folowing words, and give at least two examples. 1. pre face 5. per iphery 2. pro logue ...
【简答题】Part III Do you know the meaning of the following prefixes? Can you list more words with these prefixes? (每题 5 分,共 40 分) 1.re —retell 2.en --encourage 3.post --postwar 4.pre —pre-reading 5.under --und...
【单选题】______ refers to the deadline by which the seller makes shipment of the cargo. A.Time of shipment B. Lay time C.On time D.In time
A.
Time of shipment
B.
Lay time
C.
on time
D.
In time
【简答题】Dexcribe the methods of setting the time of shipment.
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