some things wrong with c:
* the placement of 'on earth' is just as problematic as in choice a (again, the sentence seems to be saying that residents of other planets disagree with us).
* 'as seen in the rings...' is a modifier that must be placed next to the thing that it modifies, which is 'the rate at which trees grow'. the way choice c is currently written, it says that indications of sunspot cycles can be seen directly in the rings - and it also implies that sunspot cycles (instead of trees) have rings!
A. 这说明了fund-raisers were no better than those of other universities，故正确
B. 老donators捐得更多了，这是在说fundraisers的工作做得好，weaken
C. 原文中说contact的donator中，成功率过高因为接触老的donators。而老donators主动上门without any contact，这实际上weaken了argument
D. weaken
E. weaken
A. kinship比property rights更加重要
B. 没有说高学历更加倾向引进新技术的原因是The ability to evaluate the wider economic ramifications
C. 并未提及isolated communities对引进新技术的影响
D. ”but availability of uncultivated land reduced the incentive to employ the productivity-enhancing technologies. “
E. “longer residence correlated with more adoption”，说反了
Studies have shown that farmers in developing countries who have achieved certain levels of education, wealth, and security of land tenure are more likely to adopt such technologies.
But these studies have focused on villages with limited land that are tied to a market economy rather than on the relatively isolated, self-sufficient communities with ample land characteristic of rain-forest regions.
Studies have shown that farmers in developing countries who have achieved certain levels of education, wealth, and security of land tenure are more likely to adopt such technologies.
But these studies have focused on villages with limited land that are tied to a market economy rather than on the relatively isolated, self-sufficient communities with ample land characteristic of rain-forest regions.
B． 给句子划成分：Sojourner Truth（主） spoke（谓） only Dutch（宾） for most of the time（状），之后的“she worked in the household...”如果看成一个新句子，那么它和前面的完整句之间缺少连词，语法有误；如果看成省略了连词that的time的定语从句，那么先行词代入从句后：she worked time in the household...（她工作了时间），语意有误。
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”Clearly price promotions are generally run at a loss, otherwise there would be more of them.“
bottom line：利润表最后一行，即“利润”
作者通过什么证据来证明对利润有影响？答案是B