A、q<sub>1</sub>=q<sub>2</sub>=2q<sub>3</sub>
B、<img width="68" height="22" id="图片 1" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/4fa3adaf-d61c-4fa8-9c07-6f230d1a6fd1.png" />
C、q<sub>1</sub>=q<sub>2</sub>=-q<sub>3</sub>
D、q<sub>2</sub>=q<sub>3</sub>=-q<sub>1</sub>