在种子发芽试验中，480粒发芽，20粒没有发芽，发芽率是______．
480480+20×100%=0.96×100%=96%；
故答案为：96%．
原子发射光谱分析法可进行分析的是（）
A.定性、半定量和定量
B.高含量
C.结构
D.能量
E.组成
Peter’s jacket looked just the same as Jack’s, but it cost ___________his.
A．as much twice as
B．twice much as
C．twice as much as
D．as twice much as
