下列选项中不属于实践范畴的有
A．工农业生产B．科学实验C．处理社会关系问题D．各种生理反应活动
参考答案：D
解析：本题考查实践的墓本形式概念。
The settlement is home to nearly 1,000 people, many of _____ left their village homes for a better
life in the city. [ ]
A. whom
B. which
C. them
D. those
统计结果表明，颠簸层持续时间一般不超过（）
A、二十小时
B、二十分钟
C、一天
D、一周
