通常人们把社会生活的各个部门划分为三类产业，下列哪一个产业属于第二产业？[ ]
A．捕鱼业
B．餐饮业
C．林业
D．汽车制造业
答案：D
The children all looked ________ at the teacher when he told them the good news.[ ]
A. sadly
B. happily
C. happy
托架、鱼腹梁
