Gene: Shall I open this window?Jodie: ______
A. No, please do.
B. I'd rather you didn't.
C. Please open this window.
D. I'd rather you hadn't done it.
查看答案
水样中镉测定常用方法有二苯碳酰二肼分光光度法和硫酸亚铁铵滴定法()
能够达到C2级的常见操作系统有()
A. Unix 操作系统
B. Windows Server 2003 操作系统
C. Windows 98 操作系统
DOS操作系统