社会创新的关注的要点是什么？
A、创新、有效地解决各种社会问题
B、关注自身利益最大化
C、关注环保领域的单一社会问题
D、仅关注技术进步和科技创新

A．对
B．错

A．28-32周
B．20-24周
C．35-40周
D．产前

A．By supplying all necessary information at the very beginning of the story.
B．By omitting a piece of detail at the first paragraph, and not lifting the veil until later.
C．By being intentionally obscure and writing the lead as a puzzle.
D．None of the above.