单项选择题

Antarctica has __________.

A．ten times as much moisture as the Sahara
B．the same mount of moisture as the Sahara
C．about one-tenth of the moisture as the Sahara
D．none of the above

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热门试题

单项选择题

The snow in Antarctica is very deep because it __________.

A．never stops falling
B．piles up year after year
C．never melts
D．both Ｂ)and Ｃ)

单项选择题

The snow turns to ice when __________.

A．it gets wet
B．the next snowfall comes
C．the temperature gets colder
D．the snow above it is heavy enough