单项选择题

What does this passage mainly deal with

A．The tendency of earth's becoming hotter.
B．The assessment of earth's temperature.
C．The menace of global warming.
D．The measurement of tackling global warming.

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单项选择题

What is the theme of this passage

A．Russia conflicts with EU members in meat trade.
B．Russia may risk WTO entry with EU meat ban.
C．Russia prepares to enter WTO.
D．Russia complains about food security of Bulgaria and Romania.

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.