翻卸作业线的下边缘如何确定？
参考答案：
翻卸作业线的下边缘以货堆边缘至电铲轨板边缘确定，距离轨板6米为翻卸界限。
Every time she was in trouble, she went to him for help, as he said he ________ do anything for her.
A．should
B．must
C．would
D．might
由LC组成的并联电路，当外加电源的频率为电路谐振频时则电路呈（）
A、感性
B、容性
C、纯阻性
