“学而优则仕”是传统中国人的理想追求，然而清末状元张謇却放弃仕途，毅然挂冠从商。这里反映出的观念意识是　　                                                                                          （   ）

A．实业救国

B．工商皆本　　　

C．重利轻义　

D．重商轻学

How are riveted lap joints made watertight（）.

A.The faying surfaces are coated with white lead（or similar product）before the rivets are set

B.A sealing weld bead of 1/8 or less pitch is run along the plate edge

C.The plate edge is split close to an adjacent plate and mechanically forced into contact with the adjacent plate

D.A properly riveted joint will be watertight; any leakage is stopped by setting up on the rivets