It is not stated but implied in the passage that ______.
A. Ellsworth Huntington is a fortune-teller rather than a scientist
B. cool weather is more effective on man’s creative thinking
C. certain elements in nature are more active in one season than in other seasons
D. summer is a good season for vacation
正确答案：A
50．答案为A根据第二段第一句Hefoundthatcoolweatherismuchmorefavorableforcreativethinkingthansummerheatis作出该项选择
