These levels are much lower than the levels of arsenic that remain in the bones of arsenic poisoning victims (who live for more than a day) after ingesting a lethal dose of the poison.ZT骨头里的毒素的含量对比的就是活着超过1天的受害者的毒素含量---所以E中有可能可以活过1天，举得受害者的例子就是活过1天的。这是演绎推理！！！看清楚题目！！！所以B过于绝对了，文中的论据无法支撑
choice c, wild animals have less [total fat] than [that of livestock fed on grain]
这个that of不加才是正确的，加了反倒会引起歧义。还原这个比较级 wild animals have less total fat than wild animals have that of livestock fed on grain. 可从逻辑上来说野生动物体内是不可能出现家禽拥有的脂肪
However, the real GDP is almost always higher than ever before的作用是：-> 为了反驳Citing the fact that the real gross domestic product (GDP) per capita was higher in 1997 than ever before, some journalists have argued that the United States economy performed ideally in 1997.
choice a, a fact cited in support of a claim is inaccurate 为了说明支持结论的事实是错的。-> fact是对的，1997的人均GDP的确是比以前的都要高
choice c, a fact cited in support of a claim does not prove the claim 为了说明用于支持某个结论的事实不足以证明这个结论。correct
1997年之前的24年，关于GDP的平均增长率的说法哪一项是正确的
定位：in 1997, as in the twenty-four years immediately preceding it, the real GDP per capita grew nearly one-half percent a year more slowly than it had on average between 1873 and 1973.
在1997年，正如之前的24年一样，实际的人均GDP增长速度比起在1873-1973年之间的增长速度放缓了0.5%。-> 只给出了增长放缓的事实，没有阐述背后的原因
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老师，第四题，however不能当连词，那应该用什么连词合适？