It's time for class. Let's stop .[ ]
A. talk
B. to talk
C. talking
D. not talk
答案:C
火葬的任务是:积极推行火葬,努力()和()火化率,大力推进骨灰处()、()。
若以频率为横坐标,以各谐波振幅为纵坐标,画出二者之间的曲线图称为()。