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【单选题】
设F1(x),F2(x)分别是随机变量X1,X2的分布函数,f1(x).f2(x)是相应的概率密度,则( )A.
F1(x)+F2(x)必为某随机变量的分布函数
B.
F1(x)F2(x)必为某随机变量的分布函数
C.
f1(x)+f2(x)必为某随机变量的概率密度
D.
f1(x)f2(x)必为某随机变量的概率密度
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皮皮学刷刷变学霸
举一反三
【单选题】The condition which indicates impaired blood circulation is that
A.
there is cyanosis or pallid and cold skin
B.
the patient complains of a tingling sensation, pain or numbness
C.
the skin is still normal
D.
A and B
【单选题】The condition which states that the domestic interest rate equals the foreign interest rate minus the expected appreciation of the domestic currency is called _________
A.
the purchasing power parity condition.
B.
the interest parity condition.
C.
money neutrality.
D.
the theory of foreign capital mobility.
【单选题】The typical flavor of Hunan cuisine is _________________,
A.
thick and pungent (spicy) flavor
B.
spicy and hot
C.
lighter and fresh
D.
heavy and spicy
【简答题】In personal contract hire, borrowers need to return the car in the condition which meets the guidelines of ‘_____’ stipulated by the BVRLA.
【单选题】The taste of Hunan cuisine is similar to that of Sichuan cuisine.
A.
alike
B.
same
C.
different
D.
exact
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