补全下列句子(用动词ing形式)

问题描述:

补全下列句子(用动词ing形式)
1.We can develop scientific research by?2.We can improve the rice crop yield by?3.The goverment can develop research by?

1、improving the technology.(提高科技水平)
2、studying.(研究)
3、training men for profession.(培养人才)