低绝缘电缆搪铅（封铅）是安装工作中的一项关键工艺，其目的是（）。
A.改善电场分布；
B.密封防潮；
C.连接接地线；
D.以上都有可能。
参考答案：B
One of our rules is that every student ________ wear the school uniform while at school.
A．might
B．could
C．shall
D．will
Teachers' advice of______stress over the school days must be grant．ed by the headmaster．
A．students to reduce
B．students reducing
C．students reduced
D．students being reduced
