单项选择题

The first sentence in paragraph two means that the conclusions of the experts are ______.

A．reliable
B．easy to arrive at
C．not believable
D．remote from reality
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单项选择题
Which of the following is true of the astonishing experiment
A．The experiment was conducted 15 minutes after a dog was frozen to death.
B．The frozen dog experiment was conducted by Dr. Paul Segall.
C．The dog was saved by the doctors working with Paul Segall.
D．The experiment was designed for the extension of human lif
单项选择题
The word immortality in the first paragraph most probably means ______.
A．long life span
B．mortality
C．death
D．never-ending life
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