道上棘
参考答案：道上棘 颞线之下，骨性外耳道口后上方有一小棘状突起，名道上棘。
A lot of new technology _____ into schools to make learning more effective these years. [ ]
A. introduced
B. has introduced
C. was introduced
D. is being introduced
循环氢纯度低且氢气消耗量较大，反应出口物料中的PX异构化率、乙苯转化率高，应（）。
A、提高反应温度
B、增大补充氢流量
C、降低反应氢分压
D、降低反应温度
