单项选择题A．productionB．productC．assemblyD．byproduct
单项选择题A．andB．butC．soD．however
单项选择题A．managementsB．managerialC．managersD．management
单项选择题A．headquartersB．plantsC．agentsD．subsidiaries
单项选择题A．inB．underC．withD．have
