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

<上一题目录下一题>

热门试题

单项选择题

According to the author, the following EXCEPT ____________ are good reasons for keeping a diary.

A．retaining one's own excitement
B．recording one's private matters
C．overcoming one's shyness
D．helping one calm down

单项选择题

Greenhouse gases in Par

A．2 refer to ________________.A. oxygenB. hydrogenC. carbon dioxideD. air