客家文化的基本特点是（）。
A、不忘祖宗言
B、归根认祖
C、崇尚经商
D、吃苦耐劳
参考答案：A, B, D
There were many people standing by, but _____ of them were willing to help the poor boy.
A．neither
B．none
C．all
D．both
避雷线采取隔一定距离换位，中点接地（一点接地）的接线方式，既可降低静电感应电压，亦可降低电磁感应电压，避免感应环流渣成的电能损失
