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试证明： 设 且 ，则存在x 0 ∈R 1 ，使得 .
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【单选题】The author believes that ______.
A.
the results obtained in the laboratory exactly reflects the real-life situations
B.
the gap between the laboratory studies and real-life situations is too large to fill up
C.
the gap between the laboratory studies and real-life situations can be closed by proper reasoning
D.
the difference between the laboratory studies and real-life situations will be reduced
【简答题】A special laboratory at the University of Chicago is busy only at night. It is a dream laboratory where researchers are at work studying dreamers. Their findings have discovered that everyone dreams f...
【单选题】The author believes that ______.
A.
the results obtained in the laboratory exactly reflects the real-life situations
B.
the gap between the laboratory studies and real-life situations is too large to fill up
C.
the gap between the laboratory studies and real-life situations eau be closed by proper reasoning
D.
the difference between the laboratory studies and real-life situations will be reduced
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