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【判断题】
设随机变量X的分布函数为F(x),则必有 且 .A.
正确
B.
错误
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举一反三
【单选题】In Argonia the average rate drivers pay for car accident insurance is regulated to allow insurance companies to make a reasonable profit. Under the regulations, the rate any individual driver pays nev...
A.
the average accident insurance rate for all drivers rises whenever a substantial number of new drivers buy insurance.
B.
the average cost to insurance companies of insuring drivers who drive less than the annual average is less than the average cost of insuring drivers who drive more than the annual average.
C.
the lower the age of a driver, the higher the insurance rate paid by that driver.
D.
insurance company profits would rise substantially if drivers were classified in terms of the actual number of miles they drive each year.
E.
drivers who have caused insurance companies to pay costly claims generally pay insurance rates that are equal to or lower than those paid by other drivers.
【单选题】What was true about the rise rate of average weekly earnings for all employees in 2011?
A.
It rose 1.2%.
B.
It remained unchanged.
C.
It rose more than 2%.
D.
It was less than the rise rate of the median CEO pay.
【单选题】Growth has ____ to an average rate of 4% from about 2% in 1995.
A.
accelerated
B.
promoted
C.
quickened
D.
advanced
【简答题】按电流的种类不同,动力电机可以分为 ____ 和 ____ 两大类。
【简答题】In the 20 years of its development, Zoomlion maintained a high average growth rate and has now become one of the fastest-growing global construction machinery______________.
【单选题】Suppose that currently the average inflation rate is 5% per year; however, business firms and labour anticipate that the general price level will increase by substantially more than the 5% over the ne...
A.
an acceleration of the rate of increase in the price level
B.
an increase in the productivity of business firms and labour
C.
a decrease in the rate of inflation
D.
no actual change in the price level but an increase in the level of unemployment
【简答题】On average, men experience heart attacks______ earlier than women, and have a better rate of survival after one year.
【简答题】Average Room Rate
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