科技共同体社会良知要求，其承担对公众、环境和未来的责任的先决条件是（）。
参考答案：信息公开
试述心功能不全引起的持久神经-体液代偿反应对心力衰竭的影响。
After being brought up in the countryside for a decade, the daughter returned to the big city, ________ worked his parents.
A．which
B．/
C．where
D．when
