封闭式插接母线槽是由金属板(钢板或铝板)为保护外壳，并由导电排、绝缘材料及有关附件组成的母线系统。( )
参考答案：对
Have you prepared for the sports meeting which ______ soon?
A. has taken place B. will be taken place
C. is to take place D is to be taken place
波特隆起可见于（）
A.下呼吸道感染
B.脑脓肿
C.海绵窦血栓性静脉炎
D.眶壁骨膜下脓肿
E.硬脑膜外脓肿
