What is the main message of the article?( )

The introduction of digital technology has fundamentally reorganizedlife for the poorestpeople in Africa.

The process of innovation takes longer than expected but can bringrevolutionary change.

African smalholders should focus on growing only what they can eator trade locally.

Digital technology is the only so'ution to Africa's food importproblem.

正确答案：B

What does the author say is the greatest strength of Ford's book? ( )

What does the author think of Ford's writing? ( )

What was the aim of the first laws passed regarding fashion in the 1200s? ( )

How can people best understand a particular fashion in an era,according to Ford? ( )

What does the author think of the book Dress Codes:How the Laws of Fashion Made History?

What does the author think of research funded by industry or special interest groups?( )

What does the author say about companies and special interest groups? ( )

What would scientific studies look like in a perfect world according to the author? ( )

What do we learn from the passage about researchers like birdwatchers and rock collectors?

What does the passage mainly discuss regarding scientific research?( )