水平半规管的适宜刺激是
A．以身体的长轴为轴所作的旋转变速运动
B．各方向的直线匀速运动
C．直线负加速度运动
D．直线正加速度运动
参考答案：A
．—You didn’t take the high-speed train with the leading letter "G" to Shanghai?
—________. I still took the "D" train, which saved me more than 50 yuan．
A．Yes, I didn’t
B．No, I did
C．Yes, I did
D．No, I didn’t
结肠肿瘤的典型X线征象是（）
A.充盈缺损
B."杯口"征
C."鸟嘴"征
D."鹅卵石"征
E."铅管"征
