凡属于国外铁路资产的货车均为外国铁路货车。
参考答案：对
有5个不同职业人群的冠心病患病率资料，若比较不同职业人群的冠心病患病率是否相同。比较不同职业人群的冠心病患病率的假设检验，应计算的统计量为（）。
A.t
B.
C.F
D.
E.P
It is the prevention of disease ______ its successful treatment that has led to the rapid increase
of the world's population. [ ]
A. rather than
B. more than
C. other than
D. less than
