用氧--乙炔焊接厚大焊件时，应用（）来加大火焰能率。
A.更换较大焊嘴
B.高氧气压力
C.增大乙炔流量
参考答案：A
He accidentally__________ he had quarreled with his wife and that he hadn't been home for a couple
of weeks. [ ]
A. let out
B. tried out
C. ran out
D. made out
针对受到病菌、病毒污染的物品，适宜的处理方法是（）。
A.固化
B.焚烧
C.回收
D.热解
