监控中心由计算机系统和（）组成。
参考答案：网络设备
Her descriptions ______ the details of the accident and it looks as if she was on the scene
when the accident happened. [ ]
A. result in
B. carry out
C. agree with
D. make for
A．a为动滑轮，B端钢缆受到滑轮组的拉力大小约为3G
B．a为动滑轮，B端钢缆受到滑轮组的拉力大小约为G
C．a、c为动滑轮，B端钢缆受到滑轮组的拉力大小约为3G
D．a、c为动滑轮，B端钢缆受到滑轮组的拉力大小约为G
G
G