【单选题】1公斤铀 235 裂变产生的能量大约是两千五百吨煤燃烧所释放的能量,而1公斤氘、氚混合物聚变释放的能量又是一公斤铀 235 裂变所释放的能量的( )倍。
【单选题】Whenyou read the headline “Cure That Is Worse Than the Problem” from the Internet,what do you predict to read in the article? Choose a content that bestdescribes your prediction.
A.
A new drug has been discovered but it is far too expensive.
B.
A doctor criticizes the use of medicines in general.
C.
A widely used drug is found to cause more harm than good.
D.
People would face their problems better if they did not take drugs.
【判断题】减速箱润滑的作用是减少涡轮蜗杆啮合面及轴承工作面的表面摩擦力,减少磨损,提高传动效率,延长机件的使用寿命,同时还能起到冷却、缓冲、减震、防锈等。
【单选题】You'd better take something to read whenyou go to see the doctor ______ you have to wait.
【单选题】1公斤铀 235 裂变产生的能量大约是两千五百吨煤燃烧所释放的能量,而1公斤氘、氚混合物聚变释放的能量又是一公斤铀 235 裂变所释放的能量的( )倍。
【单选题】氘、氚聚变能是铀-235裂变能释放_______倍
【简答题】Whenyou read the headline “Cure That Is Worse Than the Problem” from the Internet,what do you predict to read in the article? Choose a content that bestdescribes your prediction.A. Anew drug has been ...
【单选题】下列不属于发展氘氚聚变核反应堆优点的是_________。
【单选题】下列不属于发展氘氚聚变核反应堆优点的是()