当太阳直射D点时，北半球的人们将这一天称为
A．冬至日
B．春分日
C．夏至日
D．秋分日
答案：A
The business of the company was growing so fast that the manager had to _____ more workers.
A．take in
B．take on
C．take up
D．take after
《火力发电厂与变电站设计防火规范》规定,火力发电厂主厂房内疏散楼梯净宽不宜小于（）m，疏散走道的净宽不宜小于1.4m，疏散门的净宽不宜小于0.9m。
A.1.4
B.1.1
C.0.9
D.0.8
