对焊机接地回线的要求是（）。
A、采用焊接电缆线
B、接地回线应尽量短
C、电阻要大
D、软线绝缘良好
参考答案：A, B, D
The newspaper says that the newly released album was _______ and has become the best-seller of the month.
A．well received
B．well made
C．well known
D．well done
下列哪项不是核心家庭的特征（）
A.家庭内部资源的可用性大
B.规模小
C.成员之间的关系较单纯
D.结构简单
E.相对容易达成一致意见
