原生铅
参考答案：是指地球物质形成之前，在原子核合成过程中所占的原子百分比。
We Chinese are drinking ____ milk per person today as we did in 1995.
A．more than twice
B．twice as much
C．twice as many as
D．twice as much as
晚上小风在写字台前学习的时候，写字台上的玻璃“发出”刺眼的亮光，影响小风看书学习，请想法帮小风解决这一问题，让小风在写字台前学习的时候，不再受到这束强光的干扰．
