课堂中某些占优势的态度与情感的综合状态称为（）。
A.课堂规范
B.课堂气氛
C.课堂管理
D.课堂纪律
参考答案：B
Communications technology factors that can affect the project include all of the following EXCEPT______．
A．the length of the project
B．the availability of technology
C．executive requirements
D．the urgency of the need for information
什么是水力最优断面？
