It can be inferred that ______.
A. the New York Times had the largest daily circulation at that time
B. the papers before the penny-press era only appealed to a small circle of readers
C. the success of the four papers lies in their endeavor to improve people's literacy
D. the paper's being sensational was not favored by a majority of American readers
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According to the author, David Shenk's claim about the upgrading of living creatures ______.
A. is obviously a fault
B. is comprehensible to college students
C. is identical to his own argument
D. will be testified by his daughter
Talking about the preference for blue eyes, the author argues that ______.
A. blue eyes are purely inherited
B. few people will have blue eyes
C. blue eyes will be less sexy
D. people with blue eyes are usually wealthy
在活动难度较大时，动机强度越强，工作效率水平（）。
A. 低
B. 高
C. 中等
D. 不变
The tone of this passage is mainly.
A. humorous
B. of a matter-of-fact
C. bitter and ruthless
D. emotional
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