Many kind-hearted people            the Disaster Relief  Fund to help the victims and their families in the earthquake-stricken area.

A．devote to

B．attend to

C．contribute to

D．lead to

在后张法施工中，下列适用于钢丝束的锚具是（）。

A．螺丝端杆锚具

B．钢质锥形锚具

C．单孔夹片锚具

D．镦头锚具