单项选择题

The theory about a Snowball Earth is significant in that it can ______.

A．decode the mystery of life
B．predict the formation of a new supercontinent
C．adjust the planet's climate
D．prevent another Snowball Earth from happening

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热门试题

单项选择题

Which of the following are expected to write good diaries by the author

A．Those who are satisfied with their life.
B．Those who are satisfied with themselves.
C．Those who let things pass into oblivion.
D．Those who have something to calm down.

单项选择题

Snowball Earth might have occurred as a result of ______.

A．ice reflecting sunlight and heat
B．the growth of polar ice sheets
C．the increase of rainfall
D．the huge loss of carbon dioxide