【判断题】远程自动抄表计费系统的构成主要包括:智能电度表、抄表采集器、抄表集中器和中央服务器
【判断题】传感器命名一定要严格遵守国标GB/T 7666-2005
【简答题】读图回答问题。(10分) (1)代表地震波传播速度随深度变化的曲线:A ,B 。(填 “纵波”“横波”)。 (2)地壳的上层F是 层,下层G是 层,F层与G层密度的比较是F G(填“>”、“(3)D、E是地球内部分层的界面,D是 面,E是 面。在D界面随深度增大,横波发生的变化是 ,纵波发生的变化是 。 (4)一般认为I层的物质组成是 的硅酸盐类矿物。
【单选题】What were largely transported along the ancient Silk Routes to the world outside?
A.
Agricultural products.
【单选题】What do we learn about the Baildons' ancestors?
A.
They were bad managers.
B.
They had been treated unfairly.
C.
They had always been poor.
D.
They didn't maintain their house properly.
【单选题】Slaves in American were largely used for what kind of labor?
A.
Agricultural (farm labor)
【单选题】The voters were______largely by a desire for change.