提高耕地生产力有多种多收（复种），高产多收，光种多收（扩大面积）三种。
参考答案：对
中医学整体观念的内涵包括______、______。
According to the survey, two thirds of the area__________covered by trees now and 90% of the population__________contributions to the Greening Project in the city.
A．is ; has made
B．are; have made
C．is; have made
D．are; has made
