___________

A．Their results were decisive.

B．They were not carried out carefully.

C．They were not continued long enough to reach a conclusion.

D．The government should not have allowed the experiments.

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参考答案

答案解析

【预测】选项中的results，carried out，reach a conclusion和experiments表明，本题可能考查某项试验的结果或进展情况。
【解析】A。教授在谈及风速和岩石的试验时提到，哪怕最小的石头也需要至少每小时五百英里的强风才能被移动．而如此强大的风力还从来没有在地球上出现过。因此他认为该试验已经证明移动岩石的并不是风(that issues has been settled。由此可知，教授认为这个试验的结果是具有决定性意义的，故答案为A。

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