新时代党的建设总要求规定党的建设的统领

二维晶体含有个原胞，其原子只能在二维平面中运动，基元包含5个原子，其光学支格波的个数为： A、5 B、 C、 ...

单项选择题二维晶体含有个原胞，其原子只能在二维平面中运动，基元包含5个原子，其光学支格波的个数为：
A、5
B、
C、
D、3

如图所示，夹角呈60º的分岔管水流射入大气，干管及管的轴线处于同一水平面上。已知v2＝v3＝10m/s，d1＝...

单项选择题如图所示，夹角呈60º的分岔管水流射入大气，干管及管的轴线处于同一水平面上。已知v2＝v3＝10m/s，d1＝200mm，d2＝120mm，d3＝100mm，忽略水头损失，试求水流对分岔管的作用力在y轴上的分量Fy等于（    ）。
A.  0.17kN  B. 0.21kN C. 0.35kN  D. 0.49kN

Mr. Taylor haw been hired by Chris Co., a manufacturer ...

单项选择题Mr. Taylor haw been hired by Chris Co., a manufacturer of precious metal jewelry. Chris Co. has been having significant issues with some of their major stakeholders such as poor quality from their suppliers and complaints from their customers. Mr. Taylor has been hired to help resolve these issues and to help build a plan for resolving the company’s problem with their major stakeholders.
 
Mr. Taylor finds out how critical each stakeholder is to the organization’s decisions and actions. This is the ____________.
A.
 first step
B.
second step C.
third step D.
final step