Pitchblende and chalcolite are much more radioactive than uranium itself.沥清铀矿和铜铀云母比纯铀的放射性强得多.Chalcolite ( crystallized phosphate of copper and uranium ) is about twice as radioactive as uranium.铜铀云母 ( 铜和铀的磷酸盐结晶体 ) 的放射性是铀...
Unleaded gasoline rose more than a penny a gallon.无铅汽油每加仑涨了1分多。Certain truck gasoline tanks can rupture and burn in a collision.某些卡车的油箱在碰撞时可能发生爆裂并起火。What happens when food and gasoline supplies run low?如果食物和汽油供应减少，会出现什么情...