通气油箱通气口位于何处（）？
A.机翼外侧下部
B.机翼内侧下部
C.机翼外侧上部
D.机翼内侧上部
参考答案：A
装卸氧化性物质和有机过氧化物时，车厢内不得有任何酸类及煤屑、木屑、硫磺、磷等可燃物的残留物，车厢必须干净。
— I' m surprised to hear that Sue and Paul have _____.
— So am I. They seemed very happy together when I last saw them. [ ]
A. broken up
B. finished up
C. divided up
D. closed up
