简述减压水封破坏如何处理?
参考答案:
①若破虹吸有问题,迅速处理,保持畅通;
②迅速将水封变成油封;
③迅速处理好放大气管线堵塞或存油冻凝
与楔形不同的是,旗形形成所花费的时间较长,一般需要2周以上方可完成。( )
My brother can ride a horse and swim, and he can shoot _______.
A.as well
B.also
C.as well as
D.either