The maximum sea ice cover is about______.A．17,000 sq kmB．170,000 sq kmC．1,700,000 sq kmD．1

In winter the lake is covered with ice.（英译中)

When is the sea ice at a minimum in a year？A．In the middle of summer.B．At the end of summe

What is the main idea of the passage？A．Ice covers have been diminishing for the past decad

Which of the following is NOT true about the maps of sea ice movements？A．They are the rese

What is the main idea of this passage？A．The sea ice changes in Antarctic are different fro

Which of the following is NOT true about the maps of sea ice movements？A．They arc the rese