铆接是机体（）连接的一种主要方法。若构件受到损坏，就会破坏结构的外形，降低结构的强度。
参考答案：构件
偏极磁钢的剩余磁通量为（）。
A.7×10-5Wb
B.7×10-4Wb
C.7.5×10-5Wb
D.7.5×lO-4Wb
The Declaration of Independence, ______ the Constitution of the United States, was drawn up with the help of Benjamin Franklin.
A．and
B．also
C．as well as
D．so too
