吊装机械的规格、性能和种类应能满足吊装工艺要求，并不一定要有安全裕度。
参考答案：对
--- How did you react _____ your father's suggestion ?
--- I reacted strongly _____ it .
A．on; to
B．on ; with
C．against ; with
D．to ; against
以热成形工艺制造的管状产品，称为（）.
A.埋弧焊钢管
B.高频焊接钢管
C.无缝钢管
D.复合焊钢管
