※ 引述《surfingdream (Jimmyyeh)》之銘言： : Lyme disease is caused by a bacterium transmitted to humans by deer ticks. : Generally, deer ticks pick up the bacterium while in the larval stage by : feeding on infected white-footed mice. However, certain other species on : which the larvae feed do not harbor the bacterium. If the population of : these other species were increased, more of the larvae would be feeding on : uninfected hosts, so the number of ticks acquiring the bacterium would likely : decline. : Which of the following would it be most important to ascertain in evaluating : the argument? : A. Whether populations of the other species on which deer tick larvae feed : are found only in areas also inhabited by white-footed mice : B. Whether the size of the deer tick population is currently limited by the : availability of animals for the tick's larval stage to feed on 是否deer tick的 : C. Whether the infected deer tick population could be controlled by : increasing the number of animals that prey on white-footed mice : D. Whether deer ticks that were not infected as larvae can become infected as : adults by feeding on deer on which infected deer ticks have fed : E. Whether the other species on which deer tick larvae feed harbor any other : bacteria that ticks transmit to humans : 題目是說 因為其他品種的幼蟲也會跟deer ticks搶東西吃，所以其他品種 : 數量增加，那麼disease就會變少嗎? 不知道理解是否正確？ : 請問一下為何是答案B 不是C 我的理解是 deer ticks的larvae會吃有感染bacterium的老鼠，然後感染 現在有一種老鼠沒有感染bacterium 如果這種沒感染的老鼠增加，就可以使更多的larvae去吃這個老鼠 然後感染到的數量就會減少 -- 「啊，您現在的時光是多麼美好阿！」安娜繼續說下去，「我記得，也曾熟悉這種蔚 藍色的迷霧，就像是瑞士那些山巔上的霧一樣。這種霧，它籠罩住那一段幸福時光中的一 切，那時候，童年時代眼看就要結束了，那段時光是一個巨大的天地，一個幸福、歡樂的 天地，往後的路就越來越窄了，於是就會愉快的、也是驚惶的走進這條通道，它看起來雖 說也是光明的、美麗的——誰沒有走過這樣一條路呢？」 ----安娜‧卡列妮娜 --

※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.229.108.86 ※ 編輯: Imfine 來自: 61.229.108.86 (03/16 18:18)