单选题
How long does it take for some industries acquiring commercial potential?
A、
From five to ten years.
B、
From six to eight years.
C、
From seven to eleven years.
D、
From eleven to eighteen years.
【正确答案】
D
【答案解析】
推理题。根据第三段最后一句,产品在工艺上成功需要5~10年,而在完全实现商业潜力前,另外需要6~8年。
提交答案
关闭