问题详情

The whole passage is intended to ______.
A．help readers have a better understanding of nanotech
B．show that industries are all set for the nanotech age
C．tell readers the hurdles ahead the research of nanotech
D．reveal the potential benefits and big business of nanotech此题为多项选择题。请帮忙给出正确答案和分析，谢谢！