d．CO2decreases the PH and makes the seawater more acidic．

　　e．CO2 levels in the atmosphere go up．

　　69．Scientist Robert Dore came to the conclusion based on

　　.

　　A．his research and analysis

　　B．the expectation of other scientists

　　C．some former theory

　　D．a major cause of climate change

　　70．What does the passage want to tell us most?

　　A．It takes time to make a scientific study．

　　B．Atmospheric CO2 is doing harm to sea life．

　　C．Robert Dore is a committed and serious scientist．

　　D．Measures should be taken to prevent the potential catastrophe．

　　D

　　BEIJING, China (CNN) -- Chinese workers and army soldiers were racing to sweep snow-covered highways and unclog railway routes for millions of travelers trapped by cold weather. More than 67 million people have been affected by the weather and economic losses are expected to reach as much as $3 billion, Chinese officials say.

　　The snowstorms have damaged power lines, houses and farmland, causing fears of food and energy shortages. Twenty-four people have died and some 827,000 people have been evacuated in 14 different provinces, the Ministry of Civil Affairs said Monday.

　　In the past week, the snowstorms have hit the provinces in central, eastern and southern China.

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