1. Beverage company representative: The plastic rings that hold six-packs of beverage cans together pose a threat to wild animals, which often become entangled in the discarded rings and suffocate as a result. Following our lead, all beverage companies will soon use only those rings consisting of a new plastic that disintegrates after only three days’ exposure to sunlight. Once we all complete the switchover from the old to the new plastic rings, therefore, the threat of suffocation that plastic rings pose to wild animals will be eliminated. Which one of the following, if true, most seriously weakens the representative’s argument? --BIBLE WEAKEN NO.2 (A) The switchover to the new plastic rings will take at least two more years to complete. (B) After the beverage companies have switched over to the new plastic rings, a substantial number of the old plastic rings will persist in most aquatic and woodland environments. (C) The new plastic rings are slightly less expensive than the old rings. (D) The new plastic rings rarely disintegrate during shipping of beverage six-packs because most trucks that transport canned beverages protect their cargo from sunlight. (E) The new plastic rings disintegrate into substances that are harmful to aquatic animals when ingested in substantial quantities by them.
阅读小分队 开篇五部分非常友好，大早起来睡意朦胧悦读~~ 数学JJ发现了自己的空白的一个知识点，条件概率，贴出来希望可以帮到大家 The joint probability of events A and B is 32 percent with the probability of event A being 60 percent and the probability of event B being 50 percent. Based on this information, the conditional probability of event A given event B has occurred is closest to:
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发表于 2012-6-25 22:56:14
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