单项选择题

Human beings differ from animals because they can ______.

A．adapt to their environment
B．control their environment
C．adapt the environment to their need
D．observe and understand their environment
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单项选择题
By using the example of Galileo, the author intends to reveal that ______.
A．objectivity is essential to scientific research
B．hypothesis is based on careful observation
C．creativeness plays an important part in scientific research
D．observation is the only factor determining scientific research
单项选择题
According to the context, the simple reading done by the computer mostly refers to ______.
A．reading in search of intended information only
B．looking for unexpected information only
C．reading to locate texts to be used in teaching
D．reading to set up superior master indexes
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