【简答题】SLS工艺原理是采用 作为热源来 材料,并以逐层堆积方式成形三维零件的一种快速成形技术。
【单选题】将反应 Zn +Ag + → Zn 2+ +Ag 设计成原电池,其电池符 号为 ( )
A.
(-)Pt │ Zn │ Zn 2+ ║ Ag + │ Ag(+)
B.
(-)Pt │ Ag │ Ag + ║ Zn 2+ │ Zn │ Pt (+)
C.
(-)Pt │ Zn │ Zn 2+ ║ Ag + │ Ag(+) │ Pt
D.
(-)Ag │ Ag + ║ Zn 2+ │ Zn (+)
E.
(-) Zn │ Zn 2+ ║ Ag + │ Ag(+)
【判断题】Eastern Europeans are significantly more likely to use bluffing in negotiations than Americans.
【单选题】实现分组排序和流量控制的协议是 ____ 协议。
【判断题】启蒙运动提倡理性、人性、自由,反对蒙昧,反对封建专制。
【单选题】听力原文:M: Where did you and Tom go on vacation? W: We spend three days in Scotland, one week in Spain, and five days in Switzerland. Q: Which of the following countries was not mentioned? (2)
【单选题】—Dad, I'd like to buy a toy car. Do you have any money in your pocket? —I'm sorry, I have ______. How about buying one next time? [ ]