问题
单项选择题
海上运输保险中，若被保险人只投保了罢工险，则( )。
A．被保险人不能再加保战争险
B．按战争险费率缴付保险费
C．保险人自动承保战争险
D．加保战争险时，不另行加缴保费
答案
参考答案：B
解析： 若被保险人已投保了战争险，再根据需要加保罢工险时，保险人不另行收取保险费。如果被保险人只投保罢工险，则要按战争险费率缴付保险费。
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海上运输保险中，若被保险人只投保了罢工险，则( )。
A．被保险人不能再加保战争险
B．按战争险费率缴付保险费
C．保险人自动承保战争险
D．加保战争险时，不另行加缴保费
参考答案：B
解析： 若被保险人已投保了战争险，再根据需要加保罢工险时，保险人不另行收取保险费。如果被保险人只投保罢工险，则要按战争险费率缴付保险费。
| In 1957 a doctor in Singapore noticed that hospitals were treating an unusual number of influenza-like cases. Influenza is sometimes called "flu" or a "bad cold". He took samples from the throats of patients in his hospital and was able to find the virus of this influenza. There are three main types of the influenza virus. The most important of these are type A and B, each of them having several subgroups. With the instruments at the hospital, the doctor recognized that the outbreak was due to a virus in group A, but he did not know the subgroup. Then he reported the outbreak to the World Health Organization in Geneva. WHO published the important news alongside reports of a similar outbreak in Hong Kong, where about 15-20 percent of the population had become ill. As soon as the London doctors received the package of throat samples, doctors began the standard tests. They found that by reproducing itself with very high speed, the virus had grown more than a million times within two days. Continuing their careful tests, the doctors checked the effect of drugs against all the known subgroups of virus type A. None of them have any protection. This, then, was something new, a new influenza virus, against which the people of the world had no help whatever. Having found the virus they were working with, the two doctors now dropped it into the noses of some specially selected animals, which get influenza much as human beings do. In a short time the usual signs of the disease appeared. These experiments proved that the new virus was easy to catch, but that it was not a killer. Scientists, like the general public, call it simply Asian flu. The first discovery of the virus, however, was made in China before the disease had appeared in other countries. Various reports showed that the influenza outbreak started in China, probably in February 1957. By the middle March it had spread all over China. The virus was found by Chinese doctors early in March. But China is not a member of the WHO and therefore does not report outbreaks of disease to it. Not until two months later, when travelers carded the virus into Hong Kong, from where it spread to Singapore, did the news of the outbreak reach the rest of the world. By this time it was well on its way around the world. |
Once an influenza outbreak is started, for its spread around the world takes about ______.
A．a month
B．several months
C．a year
D．several years