If the engine backfires , the sudden pressure in the intake manifold forces the valve back.如果發動機回火, 進氣歧管驟增的壓力就迫使閥門向后移動.Also , this is why changing menus dynamically sometimes backfires.這就是為什么動態地改變菜單有時候事與愿違.My old car bac...
It can be concluded that irradiated sterile insect technique is feasible for integrated controlling cotton bollworm.輻射不育技術作為棉鈴蟲綜合防治的措施是可行的.In china, it is advanced on transgenic bollworm resistant cotton in the world.我國棉...