按规定的技术要求，将若干个零件结合成部件或若干个零件和部件结合成机器的过程称为（）。
A、部件装配
B、总装配
C、零件装配
D、装配
参考答案：D
He made another wonderful discovery, ________ of great importance to science. [ ]
A. which I think is
B. which I think it is
C. which I think it
D. I think it is
下列思想与古代农耕经济不相适应的是
A．“父母在，不远游，游必有方”
B．“生民之本，要当稼穑而食，桑麻以衣”
C．“使民重死而不远徙”
D．“估客无住着，有利身则行。出门求火伴，入户辞父兄”
