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不知道有木有人说过了,61题原题好像是GWD?
Lymedisease is caused by a bacterium transmitted to humans by deer ticks. Generallydeer ticks pick up the bacterium while in the larval stage from feeding oninfected white-footed mice. However, certain other species on which the larvaefeed do not harbor the bacterium. Therefore, if the population of theseother species were increased, the number of ticks acquiring the bacterium andhence the number of people contracting Lyme disease-would likely decline.
Which of the following, if true, moststrengthens the argument?
A.Ticks do not suffer any adverseconsequences from carrying the bacterium that causes Lyme disease in humans.
B.There are no known cases of a human'scontracting Lyme disease through contact with white-footed mice.C.A deer tick feeds only once while in thelarval stage.
D.A single host animal can be the source ofbacteria for many tick larvae.
E.None of the other species on which deertick larvae feed harbor other bacteria that ticks transmit to humans.
大家都知道了的话就当我火星吧。。
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