如构件要求铆钉能承受大的作用力，并保证构件有足够的强度，这时应该采用（）。
A.强固铆接
B.紧密铆接
C.强密铆接
D.大铆钉铆接
参考答案：A
What did the author think of his mother
A．She was stubborn.
B．She was p.
C．She did not care him very much.
D．She was not very intelligent.
关于动脉韧带的描述，哪项是正确的？（）
A.连于肺动脉干与升主动脉之间
B.由肌纤维束构成
C.来源于动脉圆锥
D.是动脉导管闭锁的遗迹
E.为动脉韧带三角的后界
