标题: OG 蓝本 37 [打印本页] 作者: 一只追梦的猫 时间: 2011-4-25 20:26 标题: OG 蓝本 37 which of the following most logically completes the argument? Although the pesticide TDX has been widely used by fruit growers since the early 1960s, a regulation in force since 1960 has prohibited sale of fruit on which any TDX residue can be detected.That regulation is about to be replaced by one that allows sale of fruit on which trace amount of TDX residue are detected.In fact, however, the change will not allow more TDX on fruit than was allowed in hte 1960s, because________.
A.pre-1970 techniques for detecting TDX residue could detect it only when it was prsent on friut in more than the trace amounts allowed by the new regulations.
B.many more people today than in the 1960s habitually purchase and eat fruit without making an effort to clean redidue off the fruit.
C.people today do not individually consume any more pieces if fruit, on average, than did the peolpe in the 1960s.
D.at least a small fraction of the fruit sold each year since the early 1960s has had on it greater levels of TDX than the regulations allows.
E.the presence of TDX on fruit in greater than trace amounts has not been shown to cause any harm even to children who eat large amounts of fruit.
答案是：A 书上讲得我绕来绕去的，谁给我简化一下，谢谢作者: dengts 时间: 2011-4-25 21:54
...for example, if pre-1970 techniques for detecting TDX residue could detect only when it was present on fruit in more than 2 unit, and at the same time the trace amounts allowed by the new regulation are 1 units, then......