精剖析重点词汇,巧突破核心句型,学业分层测评,to enjoy,At,in,to,does no harm to read,There,existence,turns,to clean,from,against,puzzled,puzzling,puzzling,was to become,to hand,was,made it possible for life to develop,to help,it,随后它会变成什么没人能知道，直到3845亿年前之间，这,团尘埃才慢慢地形成了一个固态的球状物。,学业分层测评点击图标进入,
