The purpose of George Spilich’s experiments is . We can infer from the Last paragraph that .

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问题 The purpose of George Spilich’s experiments is ______.
We can infer from the Last paragraph that ______.

选项 A、smokers should not expect to become airline pilots
B、smoking in emergency cases causes mental illness
C、no airline pilots smoke during flights
D、smokers may prove unequal to handling emergency cases