1918年5月通用汽车公司收购了雪佛兰汽车公司的流动资产。
In 1918 , General Motors buys the operating assets of Chevrolet Motor Company in May .
新公司包括原来的雪佛兰汽车公司并成为控股公司。
The new corporation includes the original Chevrolet Motor Company and becomes a holding company for auto companies .