声门噪声能量
参考答案：
声门噪声能量：发音过程中声门漏气所产生的噪声程度。
Usually there is a blackboard on the front wall in the classroom, _________there is a slogan.
A．above which
B．in that
C．on which
D．from that
计算：436×435435436-435×436436435=______．
