【简答题】D Some years ago factories had more than they have now, and they did not need to be as careful as they must be today. They did not need to worry a lot about the safety of the new products (产品)...
【简答题】Some years ago industries had more than they have now,and they did not need to be as careful as they must today. They did not need to worry a lot about the safety of the new products that they...
【单选题】In the past industries had more freedom than they have now, and they did not need to be as careful as they must today. They did not need to worry a lot about the safety of the new products that they d...