试题详情

The ice in the lake is about one meter _____. It’s strong enough to skate on.

the lake,with one end of the pipe near the bottom and the other end in the air. Near the top of the

is enough ice at the poles to cover the planet with water if it melts．Although there is no life on

is enough ice at the poles to cover the planet with water if it melts．Although there is no life on

is enough ice at the poles to cover the planet with water if it melts．Although there is no life on