题目

The managers discussed the plan that they would like to see________ the next year. A．carry out                    B．carrying out C．carried out                  D．to carry out 答案：C制约环境人口容量的主要因素是（  ）A．人口的精神生活需求B．人口的生活消费水平C．资源状况D．人口的智力及技术条件