在互补对称功放中,为改善波形,其Q点一般设置在()状态。
The _________ ___________ (组织结构)of a company can show all its departments.
In Western countries, ________ _________ (质量控制)has been widely applied in service industry.
In most cases, a limited company is managed by a __________ ______ _____________ (董事会).