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【单选题】
有支气管哮喘的结局和并发症的叙述中,哪错误的:
A.
可导致肺气肿和自发气胸
B.
可导致肺心病
C.
从不引起急性心衰和呼衰而导致患者急性死亡
D.
可导致支气管扩张
E.
可继发肺部感染
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【简答题】87~88 第87题:
【单选题】In the regression of y on x, the error term exhibits heteroskedasticity if _____.
A.
it has a constant variance
B.
Var(y|x) is a function of x
C.
x is a function of y
D.
y is a function of x
【判断题】MTM指标也叫动量指标,是使用收盘价和成交量计算得出的。
A.
正确
B.
错误
【单选题】… 除以88的余数是(  )
A.
-1
B.
1
C.
-87
D.
87
【单选题】… 除以88的余数是(   )
A.
-1
B.
-87
C.
1
D.
87
【单选题】87
A.
87-A
B.
87-B
C.
87-C
D.
87-D
【判断题】按比例定员的方法只能给酒店餐饮部配员一个框架,具体配员时还应考虑餐饮部规模、不同岗位设备设施因素。( )
A.
正确
B.
错误
【单选题】In the regression of y on x , the error term exhibits heteroskedasticity if _____.
A.
Var( y | x ) is a function of x
B.
it has a constant variance
C.
x is a function of y
D.
y is a function of x
【单选题】In the balance of payments, the statistical discrepancy or error term is used to ( )
A.
Ensure that the sum of all debits matches the sum of all credits.
B.
Ensure that imports equal the value of exports.
C.
Obtain an accurate account of a balance-of-payments deficit.
D.
Obtain an accurate account of a balance-of-payments surplus.
【判断题】The key assumption for the general multiple regression model is that all factors in the unobserved error term be correlated with the explanatory variables.
A.
正确
B.
错误
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