单项选择题

What does the report from NRC indicate

A．The earth will become warmer.
B．It is somewhat suspicious of Michael Mann's assertion.
C．The earth reaches the highest temperature in the history.
D．The proxy measurements are reliable.

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单项选择题

What is the author's attitude towards Russia

A．Suggestive.
B．Prejudicial.
C．Sympathetic.
D．Objective.

单项选择题

What is proxy measurement in Paragraph 1 likely to refer to

A．Studying the characteristics of glaciers.
B．Measuring the growth signs of aquatic organism.
C．Taking advantage of previous pictures.
D．Using clues left from the past.