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单选题

A．The first infected victim.
B．A coastal village in Africa.
C．The doctor who lust identified it.
D．A river running through the Congo.

参考答案D

解析:
Disaster movies often portray catastrophes that destroy, or at least threaten to destroy eaxthS entirepopulation. In fact, a virus emerged in the 1970s that could've been just that fatal. (22) Named after a riverthat passes through the Congo, the Ebola virus originally manifested itself in the interior of Africa in 1976.(23) Two strains of the disease, with almost identical symptoms, affected humans: Ebola Zaire and EbolaSudan. The Sudan version was deadly enough, killing 50% of those infected.However, Zaire with its90% mortality rate was even worse. The origins, though not the cause of Ebola Sudan, can be traced backto a single individual in a Sudanese town. Ebola Zaire seemed to erupt in over 50 villages simultaneously.(24) Both strains quickly invaded local hospitals when needles sharing and other unhealthy practices ensuredthe rapid spreading of the infection by bringing people into contact with contaminated body fluids. If the virushad been capable of spreading through the air, or if one infected person had unknowingly entered a largepopulation center, Ebola might have become a worldwide epidemic.However, soon after these fierceoutbreaks, the virus died out, at least temporarily. Ebola was so deadly and killed so quickly that within ashort period of time, there was no one around to infect. Hospital workers in at least one case deserted theirworkplace in panic, thus halting the administering of potentially unclean disease-spreading injections, butEbola has not disappeared. (25) With no known vaccination or cure available, it seems only a matter of timeuntil another epidemic erupts.
未知先知.预览四道题各选项，出现了Africa，doctor，Cong0，symptoms，dru9，Ebola epidemic等词，可以推断本文与出现在非洲的Ebola病毒有关。
what is Ebola viras named after?
D)。详解.短文一开始就提到，Ebola病毒的名字来自于一条穿过刚果的河流，故D)为答案：

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单选题

A．They exhibit similar symptoms.
B．They can be treated with the same drug.
C．They have almost the same mortality rate.
D．They have both disappeared for good.

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单选题

A．By inhaling air polluted with the virus.
B．By contacting contaminated body fluids.
C．By drinking water from the Congo River.
D．By eating food grown in Sudan and Zalre.

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单选题

A．More strains will evolve from the Ebola virus.
B．Scientists will eventually fred cures for Ebola.
C．Another Ebola epidemic may erupt sooner or later.
D．Once infected, one will become immune to Ebola.

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