由苏联派来的顾问团是有哪位带领的?()
A、瓦依奥列霍夫
B、萨达姆
C、戈尔巴乔夫
D、普京
参考答案:A
________ the punishment was unjust , he would accept it without saying anything, because he knew it was the rule of the company.
A.As though
B.Even though
C.In case
D.Now that
有些汽车安装了安全气囊,气囊中装有“叠氮化钠”(NaN3)等固体粉末.一旦汽车发生强烈的意外碰撞,传感器将激活特定的电路放电,叠氮化钠迅速分解生成钠并放出氮气(N2),使安全气囊打开,起到保护作用.此后气体通过气囊上的小孔迅速消散,气囊收缩.
(1)写出叠氮化钠在放电条件下分解的化学方程式:______.
(2)写出安全气囊中选用叠氮化钠的理由:______.