汽车组装、调试、检测等属于（）
A、售前服务
B、售中服务
C、售后服务
D、生产服务
参考答案：B
With its moving story and the wonderful acting, the ______ film put on this week has attracted millions of audience and is well on the way to becoming the year’s top-grossing movie.
A．three-hour’s
B．three-hours’
C．three-hour
D．three-hours
现行《中小学校教室采光和照明卫生标准》规定，教室黑板面的平均照度不应低于（）
A.100lx
B.120lx
C.150lx
D.200lx
E.250lx
