（）是指沿锻件轴向有细小长裂纹的缺陷。
A.发裂
B.端裂
C.夹杂
D.压伤
参考答案：A
A．AC=BD，AB∥CD，AB=CD
B．AD∥BC，∠A=∠C
C．AO=BO=CO=DO，AC⊥BD
D．AO=CO，BO=DO，AB=BC
Finally, tired happy, we took the subway back home.
A．and
B．but
C．or
D．more
