患者男性,32岁,因反复发作心慌行食管电生理检查。在图2-7-2中采用的刺激方法是 <div> [img=~/QImg/2019-05-09-10-11-54/image002.png] </div>

A、S_{1<\/sub>S1<\/sub>刺激
B、S1<\/sub>S2<\/sub>刺激
C、S1<\/sub>S2<\/sub>S3<\/sub>刺激
D、S1<\/sub>S2<\/sub>S3<\/sub>S4<\/sub>刺激
E、RS2<\/sub>刺激}