文章中写“我”第一次向流浪老人买奖券时,有一个十分鲜明的对比请说说这个对比的内容和表达作用

A．返混无限大

B．T，C在反应器内处处相等

C．同一时刻进入的物料在反应器内的停留时间相等

D．物料进入反应器瞬间与其他停留时间的物料混合均匀

Het cpcity is themount of energy it tkes __________the temperture of substnce one degr29. Het cpcity is themount of energy it tkes __________the temperture of substnce one degree centigrde.rising B．rising C．to rise D．to rise

A．raising

B．rising

C．to raise

D．to rise

Translation—English into Chinese It takes energy to make a car, and it takes energy to run it. Energy is expensive, and in short supply. Using energy causes pollution and contributes to global warming. The energy needed by the car’s engine comes from burning its fuel. Car engines are not very efficient. Only about 20% of the energy from the fuel is used to keep the car moving. The rest escapes as waste heat, or is used for the car’s lights, heater, etc.

段落翻译 5. It takes energy to make a car, and it takes energy to run it. Energy is expensive, and in short supply. Using energy causes pollution and contributes to global warming. The energy needed by the car’s engine comes from burning its fuel. Car engines are not very efficient. Only about 20%of the energy from the fuel is used to keep the car moving. The rest escapes as waste heat, or is used for the car’s lights, heater, etc.