标题: 求助GWD-299 [打印本页] 作者: sympho 时间: 2019-11-17 15:01 标题: 求助GWD-299 By the same techniques used for genetically enhancing plants, making them disease- or pest-resistant, researchers have been able to increase the amount of protein in potatoes, sweet potatoes, and tobacco.
A By the same techniques used for genetically enhancing plants, making them
B With the same techniques to genetically enhance plants, so that they are
C Employing the same techniques used to genetically enhance plants so that they are
D Employing the same techniques to genetically enhance plants, which makes them
E Employing the same techniques for genetically enhancing plants that make them