所谓方便器材是指门卫随功携带的电棍、匕手、刺刀等东西，它们可在方便时成为捆绑歹徒的方便器材。
参考答案：错
Mary is going to quit her job because she is tired of _____ by her boss every day.
A．shouting at
B．to be shouted at
C．being shouting at
D．being shouted at
根据接头构造形式不同，焊接接头可以分为（）。
A．搭接接头
B．对接接头
C．T形接头
D．钎焊接头
