货叉的起升高度越低，越有利于车辆的（）。
A、纵向稳定性
B、横向稳定性
C、纵向、横向稳定性
参考答案：A
—What are you doing for your vacation?
—________________________.
A．I’m going hiking.
B．I went to the beach.
C．I often go to the mountain.
D．I like going bike riding.
A．变压器输出端所接电压表的示数为20V
B．变压器的输出功率为200W
C．变压器输出端的交流电的频率为50Hz
D．穿过变压器铁芯的磁通量变化率的最大值为20/n2Wb/s
V
/n2Wb/s