From this passage, what can we learn about Preis？A．She did the study together with Nambi.B

What is the main idea of this passage?

A．The sea ice changes in Antarctic are different from those in Arctic.

B．Global warming influences the ice coverage at both poles.

C．Maps of sea ice movements around Antarctica and Arctic were made.

D．The melting of Arctic sea ice is faster than the expanding of Antarctic sea ice.

请帮忙给出正确答案和分析，谢谢！

Which of the following is NOT true about the maps of sea ice movements?

A．They are the research results of Holland and Kwok.

B．They were made in a lab located in California.

C．The data for those maps have been collected over 19 years.

D．They show the temporary changes in sea ice drift.

请帮忙给出正确答案和分析，谢谢！

The maximum sea ice cover is about______.

A．17,000 sq km

B．170,000 sq km

C．1,700,000 sq km

D．17,000,000 sq km

请帮忙给出正确答案和分析，谢谢！

According to what Holland said, we can draw the conclusion that______.

A．we can rely on satellite to estimate changes in ice drift

B．his research results conflict with global warming

C．the location of Bellingshausen Sea is around the Antarctic

D．the Antarctic ice coverage is sensitive to changes in wind strength

请帮忙给出正确答案和分析，谢谢！