According to the passage, nothing is so cold to an ordinary person as ______. From the passage we learn that ______.

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问题 According to the passage, nothing is so cold to an ordinary person as ______.
From the passage we learn that ______.

选项 A、it is possible that some scientists working in the Arctic also work in the Antarctic
B、the South Pole’s coldest temperature is still very hot compared with the cold made in a cryostat
C、a cryostat can be used to change a very low temperature into a pleasant summer day
D、the Arctic is covered by an unbroken sheet of ice several miles in thickness

答案B

解析
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