【单选题】The word 'override'(Line 2, Paragraph 1)most probably means
【单选题】There is supposed to be a safety _______ which makes it impossible for trains to collide.
【单选题】There is supposed to be a ____ which serves to give full play to workers’ initiative.
【简答题】There is supposed to be a safety ________ which makes it impossible for trains to collide. A) appliance B) accessory C) machine D) mechanism
【单选题】555定时器的TH端电平小于2UDD /3 ,端电平大于UDD /3时,定时器的输出状态是( )。
【简答题】在推荐关联产品时,有哪些需要注意的事项?
【简答题】large in amount 2.real 3.ignore or reject 4. work 5. announce publicly