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

The load limitation of governor should be reduced when ship navigating at sea, the main reason is to .

The contradiction of changes in sea ice coverage at both poles has been made clear by_____

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

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