由于安全生产责任制、安全生产规章和操作规程不健全，职工无章可循，造成伤亡事故的，应由肇事者或有关人员负直接责任或主要责任。
参考答案：错
It’s required that the students__ mobile phones in their school, so seldom _ them using one.
A．not use; will you see
B．should not use; you will see
C．don’t use; will you see
D．would not use; you will see
热情友好，既是道德情感，又是道德行为。
